Mold for airgun slugs - version 2 (.22 and .25 for Huben K1 and other high power PCPs)

Finally, second version of the mold for K1 is available.
This time I vent a little bit further and make a version for K1 as well as for other high power PCPs in .22 and .25 cal. Unlike most slugs out there, these work perfectly with choked and un-choked barrels. They are designed on LW barrel dimensions but will preform well in any barrel that has the twist rate of at least 1:18" or faster.
MP Molds is the manufacturer of these molds. At first, they will only be available through group buy. All interested, please write so on the forum in the link bellow and Miha (from MP Molds) will gather your orders and send you the mods:
www.mp-molds.com/forum/active...
To order .25:
www.mp-molds.com/product/635-...
To order .22:
www.mp-molds.com/product/552-...
www.mp-molds.com/product/555-...

[@alikhan-kx4qv]

Great video Gregor.. Like always... Amazing work and awesome video.. Keep up the exceptional work Gregor

[@airgunsofidaho4886]

Gregor i got my mp mold in .220 35gr. I am very happy with the results. i am get from my air rifles. Good job 👍

[@PortugalCarp]

Well done Gregor, pity there are not more people going done the airgun slug path.

[@pasegers]

a great and honest video !!! thank you for all the information you share ;)

[@trinitymaker5833]

Hi Gregor.... YES!!!!!! I ordered my 2 molds yesterday. Ever since Miha said the molds are being machined and will be available within 10 days (approximately 15 days ago), I've been checking the MP-Molds website. I saw them appear for purchase on the website yesterday morning (here in the USA, Pacific Standard time). I IMMEDIATELY made the purchase. I was smiling like a giddy kid on Christmas morning. I tried to explain to my wife why I was so excited about this purchase. She didn't get it.... LOL. Anyways, thanks for your persistence Gregor. I can't WAIT to fire these out of my rifles.

[@gregorkamensek3923]

Good to know :) I am posting my latest results at 100 meters today...

[@mohammedalharmi7316]

Great work, very informative .

[@alikhan-kx4qv]

Amazing work done like always... Infact you have spoken my heart out... Pellets are best for short range specially residential areas but what if one has to go for long range hunt in wild.. Then slugs with a supporting powerful airgun is the way to go... Despite my extensive search, I was hardly able to find slugs with good BC and good BC means long range with a good airgun... I would say, you are changing the dimension of airgun shooting forever.. Keep up the marvellous work Gregor

[@gregorkamensek3923]

Thanks :)

[@muhammadkhilji5234]

Gregor Kamenšek hi there I need the mould of slugs for huben k1 version 2 what's the price of it I am from Pakistan

[@gregorkamensek3923]

MP mold is selling them. Follow the description bellow the video.

[@muhammadkhilji5234]

Gregor Kamenšek for which slug size 5.52 or the bigger size should I go for huben k1 ?

[@gregorkamensek3923]

5,54 preforms best in K1

[@wayessi]

Bravo,odlična "emisija" :)

[@wildsilenthunter]

very nice and useful video as always

[@mikel9162]

Gregor, here in the US, 5 or 6 people have really been pushing the accuracy for slugs in AG' using .257 barrels form TJ's in 14/1 twist. RoachCree,, Duotat -100, tofazfou, KnifeMaker, Rifle-50 and JP. We have achieved stellar results. My .257, using NOE's .257/80 HP RanchDog design is capable of 1/2 moa at 100 yards, This is regularly repeatable. Very accurate, at 200 fpe.. One shooter, Rifle-50 has shot successfully, targets at well over 1100 yards with his .257 bench gun. Bullets are most definitely the future of AG's for long range and fpe. Thank you for your efforts! KnifeMaker

[@gregorkamensek3923]

Yes, I know about those people, the accuracy is amazing and they have done some really fine work.

[@mikel9162]

Thank You Sir. Appreciated! KnifeMaker

[@MrJamesd18]

Mike L screw TJ's. chuck one in a lathe and shine a light. watch it wobble. Get a custom medium to full bull barrel made for anything like a Texan. I was looking to buy the .257 with full 34" 1:14 .257 Pac-Nor, and though Kolbe twist rate disagrees with his choice for sub sonic, he had sub 1/2 moa all day, and I've seen .277 5 shot 100 yard group. I'll buy a Huben when they get them right & self serviceable.

[@Uncensored333]

Thanks for sharing what you've learned, Gregor, and for what you do for airgun advancement. You are solely responsible for my recent purchase of a Huben K1, so it had better be good! Just kidding, thanks again!

[@gregorkamensek3923]

It will be. Just use the correct ammo :)

[@Uncensored333]

I ordered the K1 and some tins of Huben solids from Kurvers Schietsport. The gun is V3, and I assume the solids are the latest version, too, since Fred Kurvers seems to like the Huben and know better than most how it works, so they should do well, yes?

[@gregorkamensek3923]

Definitely, Fred is an expert on K1.

[@PeakyBlinder]

Just ordered a mold for me cricket 2 in 5.52, Looking forward to trying this. Have my reg set to 120 with an fac hammer spring, looking to shoot these up to 70 yards. Hopefully this will work fine. I work with lead for my trade and weld lead with oxy acetylene so I should be good.

[@reelfishing002]

Agree , if you’re shoot 20-40 yards pellets are cheaper and will get the job done I would love to try some slugs , but it will be way over kill power for what I need

[@tomcarli1311]

Gregor, You have built the proper bullet for high power pcp air rifles but left out something important. As a life long lead alloy bullet caster it is clear that the driving rings on your bullet should be filled with a bees wax/allox lube, or something similar, to prevent leading of the bore and increase accuracy and velocity. A simple lubrasizing die in a commercial hand press will do the job. Several companies sell these for hobby use. I’m happy to advise if interested. Tom

[@jamesgreen9954]

I’ve been using a jig I made for my drill press to drill out a 1/8in deep hole centered in the rear of my boattail swaged slugs and in my rifle I picked up an extra 35fps to 40fps in speed from reducing weight very slightly but catching air better and the slug is still stable. This is a bit more trouble but it makes a difference in my gun and I can drill out 50 slugs with the jig I made to hold 5 at a time in about 20min.

[@gregorkamensek3923]

That is a good way to make them lighter, but as you mentioned, it is additional work. :)

[@charismainvestments9140]

Greg, I cannot find the PDF or the specifications about the molds on the forum, can you please post it there on the MP website? or provide your answer here? thanks

[@trinitymaker5833]

Hi Gregor. I had a question for you my friend. When the MP-Molds group buy was initiated, I purchased 2 of the molds. I purchased the .22 (5.52mm) and the .25 (6.35mm). I'm using a 24" LW barrel in my Air Force Condor. The barrel is choked. I'm positive that the choke negatively effects the accuracy of the slugs. It's subtle, but it's there. Well, I always though my barrel had a twist rate of 16:1, as that was the original twist rate for the AF barrels. Well, apparently their research has shown that a slower twist is better for pellets. So they have changed the twist rate from 1:16, to 1:17.7 (an additional 1.7). This completely changes the stability of the projectile when plugged in on the Berger Bullets Twist Rate Calculator. So here's what I want to do...... The current barrel I'm using has the following rifling characteristics (in .22 caliber): Bore Diameter: .215" (5.461mm) Groove Diamater: .221 (5.613mm) Twist rate 1:17.7 I want to purchase the un-choked LW barrel blank designed for the .22 hornet. These are the characteristics for that barrel Bore Diameter: .217" (5.512mm) Groove Diameter: .222 (5.638mm) Twist rate 1:15.4 So do you think the 5.52mm slugs would work in the new barrel, or do you think the diameter of the slugs is too small to make a sufficient seal in the barrel? What are the barrel characteristics of the Huben (bore and groove diameter)? I know the slugs are listed as 5.52mm, but there are a lot of characteristics and contours on the slug. In your video, you said that the 5.52mm slug that the front bands are 5.52mm. What is the diameter of the rear drive band (largest) that seals everything up? Is it 5.61mm or larger? Even if it's close, I can powder coat the slugs and compensate for the loose fit. Which could potentially also compensate for any superficial pitting or indentations from the casting process. Or do you think I need to just go with the 5.55mm mold if I'm going to be shooting the slugs from the .22 hornet barrel? If so, any idea when Miha is going to have a new batch of molds ready? Looks like they are sold out in every size! Also, do you think he will ever machine these molds in brass instead of aluminum? If so, I DEFINITELY want to get some of the brass models. Thanks again for your research and dedication to this project Gregor. I took my gun out to a ranch here in southern California about 3 weeks ago and annihilated some ground squirrels with the .25 slugs. Several were at the 100 yard mark, and they dropped in their tracks. But there were some VERY important lessons I learned about slugs..... I think there are actually 2 factors that negatively impact accuracy when using slugs. They are equally impactful, and equally important to try and overcome. Thankfully, you've already overcome one of them with the shape and design of these slugs. They have minimal friction and high BC making them very true in flight. But here's the second issue.... And I found it to be HUGE regarding accuracy. BARREL HARMONICS! Just the physics behind the slugs and using them in your air rifle will change the harmonic characteristics of the barrel. So for the people that aren't familiar with this term, barrel harmonics are the vibrations that transfer down the length of the barrel after the projectile has been pushed through it. You said yourself that these slugs are designed to be shout out of HIGH POWERED air rifles. I agree COMPLETELY! If you're shooting the .22 slugs, and your gun can't generate at least 75 FPE, go back to pellets. You need to push these pellets with AUTHORITY! They should be leaving the muzzle at 950 FPS or faster to achieve max stability in flight, and retain max energy downrange. The faster you can push them, the more stable they become in flight. But in order to push them faster, you need more energy through the tank and valve assembly. Well guess what happens when you push more energy through the barrel? You get more violent harmonics through the barrel. So in order to maintain good groups, you need to tame the harmonics. This may require some custom barrel bushings spread out along the length of the barrel to dampen the vibrations.... Here's what happened to me. When I first took the gun to the range, I couldn't even get good groups at 25 yards when sighting in my scope. After a frustrating 1.5 to 2 hours of dealing with this, I concluded that I was either going to have to switch back to pellets, or buy an un-choked barrel (which I still believe could only improve accuracy). I was shooting from a bench rest, and had the gun locked into place. So then I started using my buddy Jose's rifles. He has some fully custom big bore air rifles (2 in .257 and 1 in 9mm). I started shooting at targets downrange at 100 yards. Even with his gun, I was all over the place. He told me that he had just sighted in his rifles, and he sat down behind his gun and proceeded to fire off 3 rounds, all achieving 1 MOA at 100 yards. I looked at him and asked what I was doing wrong. He told me you have to really shoulder high energy airguns. At that moment, a light bulb went off in my head. So I got my gun back out, and within 5 shots had it accurately sighted in at 50 yards. I realized that by firmly shouldering the gun, I was dampening the barrel harmonics. I also realized that the last 18 inches of my barrel were kind of "free floating" in the aluminum housing of the Condor frame. So I fabricated a delrin barrel bushing that fits tightly around the barrel and slides firmly into the frame of the gun. So now I have 3 barrel bushings on the barrel. 2 of them within 6 inches of the breech, and one near the end at about 22 inches. I've yet to take the gun back out and test the theory, but I know for a FACT it's going to improve accuracy. I know this because I proved that by shouldering the gun, I was able to dampen barrel harmonics and thus improve accuracy DRAMATICALLY! And if I combine shouldering the gun in conjunction with the new barrel bushing at the end of the barrel, my group sizes should be cut in half (or more). So that would be my advice to your readers and subscribers. If you guys shot these slugs, and didn't get the accuracy you though you should get, go back out to the range and hold that stock tightly against your shoulder and try grouping again. I promise your accuracy will improve. Then inspect your gun/barrel configuration and figure out if there's a way to insert some of barrel bushing to tame the harmonics of your barrel. Then your accuracy will improve even more. Thanks again Gregor!

[@wildrangeringreen]

minimal friction has more to do with velocity than anything else. Gyroscopically-stabilized projectiles don't require any particular velocity to be stable; they require a minimum RPM, and that is a combination of velocity and rifling twist. It doesn't matter how fast you shoot the projectile, if the rifling can't stabilize it. Length of projectile vs its weight, balance, and diameter also has a huge role to play in stabilization. To Give everyone a hint: most air rifles are meant to shoot DRAG-STABILIZED diabolo pellets, so their twist rate is insufficient for bullets of any real weight. Choke Boring doesn't hurt accuracy, in some instances, it actually can improve it by conforming projectiles at the muzzle and offering some resistance to minimize FPS deviation. Most rifled barrels made today are not choked, because it was found that it wasn't enough of a difference in breech loading guns to warrant the extra cost associated with producing them. As far as barrel harmonics are concerned, "eliminating" or "taming' the whipping of the barrel seems to be a fantasy of air-gunners (look at the amount of "stuff" sold to do just that). You can never eliminate or deaden the whipping of the barrel on a gun to the point it doesn't affect where the projectile goes. The key to accuracy is finding a pressure/projectile combo that has the barrel whip around the same way, every time, so that the muzzle is pointing the same trajectory when the bullet leaves. You can slightly modify the gun by changing weight distribution in the barrel. Most Air gun barrels are not free floated, so the way the forearm is supported absolutely affects barrel harmonics. Shouldering the gun, on the other hand, has very little to do with harmonics, and far more to do with eye position; particularly as it pertains to sighting down sights or parallax in a scope. Inconsistent shouldering leads to inconsistent eye position, leading to inconsistent sighting. Basics of shooting any thing with a shoulder stock (crossbow, firearm, air-gun). A gun is a gun, doesn't matter if it uses powder or compressed air. As far as the end-user is concerned, everything that applies to firearms applies to air guns, and vice versa.

[@everythingairgunninguk6954]

Hi Gregor could you send me a link to where to buy the huben k1 swaging and mould kit please thankyou.

[@Sertao2013]

If you don't know about Johnny Lee look into his molds for swagging . They are the best in the world .

[@hmooblubneej7116]

Would really like to see these ammo on airforce condor.

[@eddiebrundrett5785]

Nice work on the priest I have just got one ln 177 put my barrel is touching the bottle

[@gregorkamensek3923]

Hmm. That is not good. I suggest you contact your distributor...

[@PeakyBlinder]

Huben or cricket that is the question, I have a tuned cricket 2 and love it, That huben looks sweet though. 😎

[@petergoodman7805]

Great video. Air gun ammo has been needing accurate bullet ammo for years. What gun would you recommend at around 950 fps with the new bullet? I'm looking for something I can get around 40 shots in .22

[@gregorkamensek3923]

Hm, 40 shots is a lot for the power needed for to get the bullet to 950 fps. Huben will have about 35 shots but you need to fill it to 350 bars to get this shot count. You can fill it only up to 300 bars and you will probably get about 27 - 30 shots. For other guns I suggest you look for guns that are capable to push them .22 to 70 ft-lbs or .25 to 100 ft-lbs... and still high shot count...

[@richardjones2811]

You should sell the bullets online my friend so people can buy a sample pack. If they work well then people will buy the kit and make their own.

[@gregmcb5305]

If someone was going to cast in tin this would be the way to do it. I could see a .357 huban slug cast In tin being supper effective for a tin projectile.

[@trinitymaker5833]

Ok Gregor....... Update on the .25 mold I own. I ran into a snag this weekend when casting. There's an old saying- "A chain is only as strong as it's weakest link." Well, I found the weak link in the chain regarding these molds. It's the shoulder bolts that hold the sprue plate in place. There are 2 of them. One of them is used to allow the sprue plate to pivot. The other has a steel t-collar around the shoulder that becomes a stop for the sprue plate. So here's what happened...... Each time I heat my mold and cast with it, I've noticed the hex head shoulder bolt that the sprue plate pivots on works it's way loose. I realize that there's a very small set screw threaded in the side of the mold to help prevent this from happening, but it also works it's way loose with the expansion and contraction from heating. So at least once in the mold pouring process I would stop and tighten down the bolt and the set screw because I could see play in the sprue plate when it should have been sliding perfectly perpendicular to the top of the mold..... Well, the last time I tightened it down, the bolt sheared off at the shoulder. So I had the pleasure of drilling it out and re-tapping the hole to fix the threads. The reason this happened is because the heating of the mold to between 315-370 degrees C re-tempers the steel of the bolt and makes it softer than it was when it was new. So here's what I want to do..... I'm going to buy several of the shoulder bolts. If anyone is reading this...... Buy these bolts: Shoulder bolt... Hex head OR socket head M8 x M20 (8mm is the shoulder, 20mm is the length) The threads are M6 x 1.0 Buy several of these, and swap them out occasionally. Also, when you tighten the set screw that prevents the shoulder bolt from backing out, it will leave marks on the threads of the shoulder bolt. What I'm going to do is to grind the threads in this small area, and drill a small indentation on that flat spot that I grind. That way the set screw will actually recess into a socket in the shoulder bolt, and it won't BUDGE. Also, when you guys use sprue oil on your mold during casting, lubricate the pivot point where the sprue plate pivots on the shoulder bolt. But that was my experience.... If you guys own this mold, I would recommend you buy and do the aforementioned steps.

[@gregorkamensek3923]

I had a similar problem with the unscrewing of the bold because of the stretching of the material due to temperature changes. Mine is still OK but the spring washer that is pushing the plate down lost its tension, and I installed two of them instead of one and now it is like new again...

[@trinitymaker5833]

@@gregorkamensek3923 I was wrong about the dimensions of the bolt. This is what people will need to order to replace the existing one if it breaks. www.accu.co.uk/en/socket-shoulder-screws/436345-SSH-M6-8-7-A2-BL I think the stainless steel will hold up much better anyways.

[@trinitymaker5833]

Hi Gregor.... I wanted to report back to you regarding the performance of these slugs with my .25 air rifle. So here is my set up: AF Condor w/24" choked Lothar Walther barrel .5L 250 BAR CF air tank from Talon Tunes, Constant Air pressure regulator from PCP tunes (set to 190 BAR) Discovery Optics FFP scope Custom 1 piece Mad Dog rifle stock DonnyFL Ronin Suppressor When I fill the tank to 250 BAR, The preceding platform gives me an average muzzle velocity of 865 FPS with an extreme spread of 7 FPS for 18 to 19 shots before the reg drops off and the velocity starts to decrease. So last weekend I visited family in Bakersfield, California. My bro-in-law has 5.7 acres of land with a shooting range set up on it. He has targets set up at 25, 50, and 100 yard ranges. With the gun and barrel FULLY stabilized to eliminate barrel harmonics, I was achieving the following groups: 25 yards- hole in hole shots EVERY SHOT! I'm not kidding. They were hole in hole! 50 yards- 1/2" groups. No flyers. 100 yards- 1 MOA groups. I think I could have done better but there was some wind. My best shot of the trip was a head shot on a squirrel at 182 yards. I just couldn't believe how straight and true the slugs fly. One thing I think I could do to increase accuracy even more is to switch from a choked to an un-choked barrel. I think this could tighten my groups up significantly. But these slugs are AWESOME! I also found that my gun likes these slugs in pure, 100% soft lead. I poured the slugs in 3 different alloy blends 1. 100% lead 2. 97.5/2.5 lead/tin 3. 95/5 lead/tin Even the slight alloy blend didn't perform as well as the pure lead. I think the 97.5/2.5 blend would perform awesome in an un-choked barrel, but the choke at the end of my barrel mixed with the additional hardness of the alloy blend throws off the accuracy. I plan on buying an unchoked barrel in the very near future. But I though you would appreciate some feedback on these AMAZING slugs!

[@gregorkamensek3923]

WoW!!!. That is excellent. I really appreciate this feedback, as this slug was not properly tested before release (I am still waiting for K1 in .25). I was pretty sure that the design was right and that they should at least preform as well as the .22 version and I am very happy that it seems that they even outperform them. You are now the second person that I had direct feedback from and I really appreciate it. There is nothing better than to read a report like this and know that my work is appreciated :) Thanks!

[@Bc-um9qx]

@@gregorkamensek3923 I'm looking for max fpe do u have a heavy .25 slug I can buy ? And are there any reasons not to adjust reg pressure to just below red 210 bar for maximum fpe and close to medium range accuracy at 30 yards I cant miss

[@gregorkamensek3923]

@@Bc-um9qx Hi. First, let me point out that those slugs are not appropriate for K1 version 2020 + because the barrels used in those guns have too slow twist rate. I explained this in the newer videos... I assume you have K1 in .25 cal since you are mentioning 210 bar max reg pressure. Huben has a self limiting valve design that peaks out at about 180 to 190 bars. This limiting design closes the valve faster when pressure is higher. The closing speed also depends on slug weight and friction - if the slug is heavier and/or has more friction, the valve will stay opened longer (this is why you should not use low pressure with heavy / high friction slugs as the valve will not close in time any you will get huge air dumps). So you will most likely not gain any power by going over 190 bars. Also keep in mind that Huben was designed initially for .22 cal and with .22 it can achieve amazing powers, but since they did not redesign the whole gun for .25, you will not gain the power proportionally to the caliber increase. In my test, I got only up to about 140 joules, so I would say that reasonable power setting is about 130 joules (for accuracy, efficiency,...).

[@michaelgarcia156]

Hello Gregor. Do you know what the dimensions should be for the huben .25 slug?

[@emp731]

really good advice....Learning to be very picky with the selection criteria for the perfect bullets to keep,when casting..Cheers.Any news of the cold press die you mentioned?

[@gregorkamensek3923]

unfortunately no. I will stick to casting.

[@gregorkamensek3923]

Hi to everyone. I did get a hold of Miha and he let me know that the molds will be available soon.

[@SurvivalMX]

Thanks a lot Gregor! So this mold will be good for the new huben k1 v2 in .25 cal?

[@gregorkamensek3923]

I have yet to test this. I will release a video as soon as I receive the K1 .25

[@SurvivalMX]

@@gregorkamensek3923 well I already order it and I will receive it very soon.. lol... hopefully the mold in .25 and the slugs work perfect in the huben .25...

[@dannybax1982]

@@gregorkamensek3923 Which .22 mold will be the best for a Huben K1 V1 ?? The 5.52 or the 5.55 ? Thinking of buying a mold for my Huben and my Airforce Condor project.

[@gregorkamensek3923]

@@dannybax1982 If you have my custom barrel, you might get slightly better result with 5.55, for everything else, I would suggest the 5.52 version. So 5.52 is a more versatile option.

[@azarmilic2891]

Hi there. Would this be ok for Fx crown 22 cal? Where can I get alloy for casting these slugs? thanks

[@9Enrico0]

those molds can be used for create 22lr wax or hot glue slugs?

[@MSH.M]

First of all, thank you very much. second, your video was in 2018 and now huben 2020 edition has been released and it's barrel has been modified. Question dose the setting in this video able to be applied on the newest edition? Third, what is the mechanism of the molds are they casting molds or pressure molds?

[@gregorkamensek3923]

Till now, I only tested the new barrel in .25 cal K1 2020 and these slugs are NOT appropriate for that barrel as I mentioned also in the video. I have not had a chance to test 2020+ version of the .22. These are casting molds.

[@airrifle5626]

Hi. How can i buy some molds to try them first?thank you.

[@trpe71]

NIce work Gregor, any plans for a .303 slug?

[@jayben00]

With all this being said (in video). Barrel Rifling Twist rate becomes the final link to accuracy for shooting slugs. Could I have your thoughts in appropriate application of twist rates.

[@gregorkamensek3923]

HI. Judging by calculations, all of those slugs that are shorter than 11 mm in .22 cal are perfectly stable in any barrel that has a twist faster than about 1:18". This means that all LW design barrel that are most common will stabilize tem without a problem, This also proved in my testes.

[@trinitymaker5833]

Gregor, were you ever able to get a measurement for the ballistic coefficient of the 5.52, 5.55, and 6.35 slugs? I'm sure the two 5mm will be extremely close. But I'm just curious if you or anyone has done the research and calculated the ballistic coefficient so it can be plugged into a stability calculator.

[@gregorkamensek3923]

Not yet

[@nuangel]

Will the .25 bullets fit in the FX Impact and fit in the magazine? Which mold is it57 exactly , kind of difficult to find specific products on the site, will it be the .257 ?

[@gregorkamensek3923]

I do not know about the FX, I also believe that FX might be slightly under powered... These will not be in .257

[@DuncanHeather]

Just received my .25 moulds Thank you! When will you be bringing out the videos on swaging you mentioned, please.

[@gregorkamensek3923]

Unfortunately, the person I was trying to work with did not deliver his end, so I am afraid nothing come out of this.

[@richardstrombergoverkill5099]

You tube : HMHen

[@richardvanleeuwen5519]

Gregor, when you added the Linotype to the lead did you had to add flux? I dont have Linotype but have antimony and tin but i read some articles that it is nessecary to use a certain flux. Cheers Richard.

[@gregorkamensek3923]

I haven't flux but I do know that it is recommend.

[@AbuBassam-Al-Bassami]

I melt lead gamo bearing in mold. Does Qamu lead contain Leotype

[@new2diving]

From your video series the first batch of terrible looking Huben slug is the best. Those made by Huben's swagging kit is surprisingly just OK despite the high-quality appearance. May I know how the preformance of these multi-ring slugs compare when used in Huben K1 ?

[@gregorkamensek3923]

If properly casted, the accuracy is about the same as Huben swagged slugs. The are more efficient though (less pressure needed to get the same energy)

[@davidvazquez7862]

Hi Gregor very good video a cuestion how many versions of huben came out an what barrel does the 2018 huben brings is it chinnees with choke or with no choke or is it lothar walther with choke or not and the twist rate of it thank you.

[@gregorkamensek3923]

It would be better is you asked Huben this question, but as far as I know, the first K1 V1 had LW standard airgun choked barrel with 450 mm twist. Every K1 after V1 has LW airgun choked barrel with 416 mm twist. The 5,52 slug preforms well in both these barrels (assuming the forcing cone on V1 is modified) and the 5,54 works well on both of these barrels as well as the custom barrel sold by Rojal. If fact, the custom barrel form Rojal worked more accurately with 5,54 as the original Huben slugs.

[@davidvazquez7862]

Thanks Gregor for the info

[@jayben00]

Gregor, with the recent release of the FX “smooth twist barrel liners” (STX) for slugs, I wish you could do a review on polygonal rifled barrels. I know some manufacturer is now doing polygonal barrels; l just cannot remember who. While the smooth twist feature is proprietary and probably patented, I see it similarly achieving the same effect as polygonal rifling. In my eyes cost in manufacturing would set them apart.

[@gregorkamensek3923]

Hi. I tested the slugs in .22 (5,52 equivalent) in LW poly barrel with half choke and it works excellent. I have not get my hands on STX yet but i should soon.

[@jonathanstaley3883]

Great looking products. Do you do any mounds in .308? I have the Texan and am in Europe. A 130gr RHBT would be awesome.

[@gregorkamensek3923]

No, nothing in 308 at the moment... But you can check MP mold selection, 308 is very common caliber and I know he has quit wide selection...

[@nekeke1]

👍👍👍👍👏👏👏 I just can't wait for the swagged slugs, neither.

[@giorgibedoshvili848]

Have you had any experience with a .22 fx impact slug liner with 15.5 twist, which MP-mold would be good ?? thanks

[@gregorkamensek3923]

I have one stx barrel with 1/16 twist to play with but i havent done enough tests yet to give you any reliable answer...

[@giorgibedoshvili848]

@@gregorkamensek3923 thanks for answer.

[@airgunsofidaho4886]

Would the lothar Walther Airgun barrel with 1/16 twist rite be a good choice for the 5.52 slugs. And can a .22 barrel with a 1/17.7 twist rite stabilized the 5.52 slugs.

[@gregorkamensek3923]

The answer is YES to both your questions. But keep in mind that you will need a bit more force to put these slugs in the chamber in regular airgun... The front three rings are about 5,52 mm but the rear ring is about 5,66 mm. You can of course size them to avoid this issue.

[@airgunsofidaho4886]

@@gregorkamensek3923 thanks

[@pauljolliffe2222]

Hi Gregor - please advise what lead / alloy you use for the 5.52 MP Mold - I recently or the 5.52 Mold

[@gregorkamensek3923]

Hi. I use mixture between 1:5 up to 1:10 linotype : lead. You can use this table: www.castbulletassoc.org/download/Alloy12.xls

[@frank2043]

@@gregorkamensek3923 i ordered the .217 mold do you have any guess what the BC is for these?

[@mariojerekarov9538]

Hello Gregor, Will 6.35 mm give good results on tuned sumatra 150 joules.I believe my sumatra barrel is .251 and that us the reason most of the slugs I have tried to do a bad grouping. I've tried Altaros 49.5gr and the results were very bad. With 66 grain altaros there was some grouping on 50 meters but it was around 4 inches. Please advise.

[@gregorkamensek3923]

It might, but I cannot say for sure because I have not tried them in that gun.

[@RyanSpringer1984]

Ever try using the piledriver (or similar) in a break barrel?

[@gregorkamensek3923]

No, and I would also not recommend it.

[@rafalmietek]

Thx Gregor, You are one of the first discovers of new age of PCP. But when we can take this meld? (I'm wating on forum :) ) We still waiting for new videos about new plug/bullets :).

[@gregorkamensek3923]

Video will probably be in about 1 week, we had some bad weather here... Mold will initially be offered as a group buy through MP mold forum.

[@rafalmietek]

And film about swagging process?

[@gregorkamensek3923]

I do not have the swagging die yet...

[@rafalmietek]

We are still waiting for your shots.

[@jeansandmyshirt]

are hollow point bullets or slugs more accurate than the round nose ones? i thought the hollow point would cause more drag. i noticed jsb and off the shelf slugs are all hollowpoint. do you have any information please? im trying to find a .25cal mold for my pcp. thanks.

[@gregorkamensek3923]

Typically, hollow point can be just as accurate and efficient (BC) as round nose. However if you do not hunt, I would stick to round nose as you don't need the hollow point. In terms of best BC possible, round nose with boat tail are the best solution but it can be challenging to get them to be accurate...

[@Hackerzy1]

Hello gregor, i signed up for ordering the mold. When do you think preparing and shipping the order will happen for the group? Is there a specific number of orders to reach or time to wait? Please keep us updated as we all eager to buy this product. Cheers.

[@slugsfc7422]

I'm also anxious, I asked in the group how many members are necessary to start manufacturing, but they did not respond. Do you know something Gregor? Thanks since now.

[@PeakyBlinder]

Hi Gregor Them cast slugs they don't have a hollow point, does this make a difference in your opinion

[@gregorkamensek3923]

Generally, with proper shape, both, hollow points and round nose can be accurate. As a target shooter, I still prefer round nose but the hollow point is extremely important when it comes to hunting.

[@PeakyBlinder]

@@gregorkamensek3923 yes, I'm looking into making a jig to make my own holes.

[@fxpestoperator5527]

Friend, do you use pure lead to make slugs? Thanks

[@gregorkamensek3923]

If it is for K1, then no, i use the mixture I mentioned in the video. For other ariguns, pire lead might be better option.

[@byemslug4389]

hello I will know the mold mp 5.55 and keeping problems with the nesesitaria production if you can pass the data that type of alloy estáutilizando or gave you better results to make the bullets thank you very much! from argentina a greeting

[@rvleeuwen3589]

Hi Gregor, MP Molds sells 552 and 555 model. Which one is the best for a 2016 K1? TIA, Cheers Richard

[@gregorkamensek3923]

552

[@loisroche3480]

Where I can find 22 and 30 gauge molds. Thank you

[@radomirzednicek592]

Gregor, I've just casted my first slugs .25 for my Huben MK VI using MD mold from Slovenia. Looks great !!! Do you have the best Huben setting for this ammo? Regulator pressure, thus m/s vs. energy? Thanks a lot for a great videos 🙂 Btw, ballistic coefficient would be great - I use Pard NV008S LRF with ballistic calculator.

[@gregorkamensek3923]

You will need high pressure, 180 - 190 bars. The BC is roughly 0.22

[@radomirzednicek592]

@@gregorkamensek3923 thanks a lot Gregor

[@AbuBassam-Al-Bassami]

Hi gregor What is Leotype and how it is mixed with lead. Is it necessary.

[@gregorkamensek3923]

You can find some a calculator here: castbulletassoc.org/download/Alloy12.xls Pure lead is too soft and you need to add additives to make it harder. Linotype is my choice but you can use any other additives to make it slightly harder.

[@jayben00]

Regarding my previous post: For the non-competitive airgun shooter, l might be just splitting hairs in asking for a comparison between rifling types. For that matter, button rifling or preferably 5R rifling could prove more than sufficient. Your thoughts?

[@gregorkamensek3923]

I could not speak form experiences. All my barrels till now as LW as other barrels are not that widely available in EU. In case of Huben, I would say that the accuracy is more dependent on the slug and the fact if fires form the magazine. As long as you have LW barrel (choked airgun or LR), you will get good accuracy with correct slug.

[@niksechtniks]

Great video! di you try these with the tri priest ?

[@gregorkamensek3923]

Yes, but they need to be sized otherwise they have too much friction to get them in the barrel/chamber

[@PeakyBlinder]

Ok i now have v1,v2 and v3, v3 is the dogs gonads imo, I have just purchased 50kg of linotype, and my question is, what percentage of lead would you recommend ? Im thi king od 10 percent.. May i add, i had a cricket slug barrel modified to fit my k1, is has a 1 in 12 twist rate and seems to be a lot better than the 2022 chinese 1 in 17 twist. So the way i see it is the 1 in 17 is trying to cated for pellets and slugs. It dont work as well as a dedicated slug barrel.

[@gregorkamensek3923]

Hi. Yes, 1/10 linotype to pure lead is a good mix. That is what I most often use. Regarding twist, I would say the following: there is too much focus on the twist. It is true that you need to be in the correct ballpark to have good result but for slugs that can be loaded in K1 (max 11 mm length) 1/17 is more then enough. More important are correct dimensions and probably most important is forcing cone and also muzzle crown (but muzzle crown gets too much focus anyway...). I am guessing that is why you got better results with 1/12" twist. Also, K1 Chinese barrel does not have the best manufacturing quality...

[@thespectator2976]

u need an FX and your set for life :)

[@gregorkamensek3923]

Next on the list... :)

[@MrIonutz2008]

Have you tried the MP slugs in the FX slug liners, or do you know anybody experiencing the MP's in FX slug liners ? I have a .25 cal slug liner 500mm long planning to put it into a Condor platform and wondering if MP will be matching this barrel for precision. Thank you.

[@trinitymaker5833]

Gregor..... Sorry to be such a nag. I was curious if you could tell me the weight of the pellets? This will determine regulator settings on my rifle. How many grains for each make and model? Thank you sir! You're doing great things for the world of air gunning.

[@gregorkamensek3923]

Hi. It depends on the alloy used but they are about 36 grain for the 5,52 and 5.54 and 48 grain for the 6.35.

[@phillipmendiola1257]

I have a Kral Puncher mega 25cal senthetic tuned installed a mega ss balanced valve from Jefferson state air rifle usa , 950 FPS , I been using cast rounds from Neilson co. 33.9 gr and 39, 9gr very accurate all the way out to 100 yards , I have bee looking for boat tail cast rounds , awsome vidio

[@gregorkamensek3923]

Thanks :)

[@tedcodrea2173]

Hi Gregor, thank you for the videos. I have the .22 caliber (5.52 mm) mold and it is indeed very well made. The one problem I'm having with the slugs as casted is the length, they are just a fraction too long to fit in the Umarex magazines. Also, will there be a heavy weight 17 caliber slug available? Keep up the good work.

[@gregorkamensek3923]

Hi. These slugs were designed for K1 because there are almost no slugs available for it (at least not at the time), I did present and showed that they can be used in other guns as well but it was never tested for Umarex. I will have new version of molds (.25 and .22 cal) but they will also be dedicated for K1 and using them in other airguns will need to be tested by the user. At the moment, I don't have any intention of making a .177 slugs. It is also probably not a good idea to cast such small slugs, even .22 can be problematic and requires much experiences to cast properly, .177 would be even harder. The problem is that smaller objects (slugs) have much bigger surface area to volume ratio (because surface area is dependent on square of its main dimension while volume is with cube), and many problem are related to this fact such as surface tension (liquid), rapid cooling,...

[@debodevil6974]

What Umarex do you have that uses slugs or capable of firing slugs???

[@Jam-uv5wr]

super...škoda ker mam smooth twist cev...bom pa spremljal,ker nameravam kupiti 700mm smoth twist x...za 7.62 boš verjetno tudi kakšne teste delal...me zanima ker bc bo boljši v 6.35 ali 7.62...

[@gregorkamensek3923]

BC bo boljši v 6,35, ker si ne morem privoščiti dovolj velike mase pri 7,62. Kalupa v 7,62 verjetno ne bo, bo pa swagging die...

[@chickennugget4819]

Has anyone tried these slugs in an FX impact? I purchased this mold for a Maurader and they are way too heavy. I’m not totally sold on the K1 because of the difficulty of unloading it.

[@yunielalfonso773]

Final I found your page (mp molds).I buy 25cal one and look for 50cal 495 diameter hallow point but not found any hope you make them because your mold give the quality of slugs I want.thanks for your work

[@gregorkamensek3923]

Hi. That is not my page, that is from my college Miha. He makes molds for me as well...

[@yunielalfonso773]

@@gregorkamensek3923 I look little bit there but not see any 50 cal 495 diameter.I have a Aea challenger bullpup 50 cal is amazing but get mold for those is little work lol

[@yunielalfonso773]

@@gregorkamensek3923 yesterday the 25 cal mold I buy from him got delivered,look amazing piece of work real high quality

[@new2diving]

May I know if there are any information / video on how the mold is used ?

[@gregorkamensek3923]

you can check the video of the previous version: kzbin.info/www/bejne/rmq6hpuQZqiFopI

[@WaschyNumber1]

Are ther molds for pellets with about 16grain for Sub12ftlb air rifles 🤔

[@trinitymaker5833]

Hi Gregor..... I know you made this video a LONG time ago, but I had a question regarding the dimensions fo the MP-Molds slugs. Do you know the diameter of the largest drive band on each type of slug (5.52, 5.55, and 6.35mm)? The reason I ask is because I ordered new barrels for my rifle with faster twist rates from the Russian Federation. Well, the barrels are slightly different in diameter than the stock LW barrels I'm using. According to Alex (the manufacturer) the .25 barrels has a twist of 1:14", and the diameter of the lands and grooves is 6.35/6.5mm (.250/.2559 inches). If it's close, I can compensate with powder coating. I'm able to add .01 to .015 inched of diameter to the slugs by powder coating. The coating is thin enough that it doesn't impair the drive bands. The .22 barrel I bought is 610mm with a twist of 1:16 inches. The dimensions are 5.45/5.6mm (0.214/0.220). Do you think the 5.52 mold I have will work with these, or do you think I need to purchase the 5.55mm version? I guess I'm just looking for the dimensions of the largest drive band on each type of slug. Then I know that the band will make a proper seal against the grooves in the new barrel. On the NOE Bullet molds website they show the dimensions of every round. Thsnks Gregor. I'd go to MP-Molds, but the NEVR respond. They even removed the forum where we used to post.

[@gregorkamensek3923]

The .22 barrel will probably work best with 5,52 slugs but I would not advise to use 6,35 slugs in the barrel you are describing. Judging by dimensions, this is actually a .257 barre. I have on just like that form TJ and it does not shoot my slugs well... Mp mold slugs have the bigger band as follows: 5,52 has about 5,66 band; 5,55 has about 5,69 band and 6,35 has about 6,46 band. The problem with 6,35 will be that the smaller bands will not engage the lands as they are somewhere between 6,33 up to 6,35. I would advise to use .257 slugs / molds for that barrel. I assume you are not using this barrel in K1 .25 as it has the magazine sized to 6.46... I work with MP molds because it is a local company and I am very satisfied with their mold quality. I do not however influence their sales tactics... I am actual waiting for a new version of a mold that will be flat base, but I am not sure when it will be ready. I don't plan to make a size for .257 as there are a lot of option for this caliber already out. I mainly focus on slugs for Huben as K1 has some limitations and there are not a lot (or none) appropriate molds / slugs out there to fit.

[@trinitymaker5833]

@@gregorkamensek3923 Alex said he can make the barrel with 6.29-6.30mm lands and 6.45-6.46mm grooves. Do you think this would do well with the 6.35 slugs?

[@gregorkamensek3923]

@@trinitymaker5833 This should be the correct dimensions for the slugs, yes. But I think you should ask yourself one question: is it really worth making a barrel for the slug, usually it goes vice versa. Also, what is the gun that you would like to shoot it with? What is the power it can achieve?

[@alejandroo80]

Great news Gregor, this has been a long time in the works, I hope that the swagging kit is available soon because I don't know much of casting. Thanks again for all the hard work and efforts to push the Huben platform ahead and not letting everyone out in the dark (a Huben's responsibility first of all). One more thing, can you share your accuracy results with the cast ammo in the Edgun R5 .25 ???,is it 1.5 MOA at 100mts also or is it less ??. Other things that I have to ask you are going through email. Have a great weekend and I wish you lot of time and patience to upload 1 video per week, I also want to start uploading more content to my channel, mainly in Spanish but also something in English once in a while, keep in touch my friend !!!!.

[@gregorkamensek3923]

The accuracy with R5 .25 was about the same as with Cricket and it was from 1.5 to 2 MoA depending on the quality of the cast slugs. The limitation here is only quality of the casting...

[@alejandroo80]

Gregor Kamenšek thank you very much for the info !!!

[@kill-em-deadairgunner]

I have a R5 Matador.30 Standard and a R5M Standard 25cal....i wish i could just order the slugs...i dont know how to cast them...but witch ones would be best for the two i have?

[@gregorkamensek3923]

I dont have any slugs in. 30

[@kill-em-deadairgunner]

@@gregorkamensek3923 i also have a .25 Edgun R5M Matador Standard...i Mentioned that in my comment....would like to buy some slugs for it...where can i buy some at???

[@georgealexandrurobu7075]

I get 340 m/s with this 6.35 bullet..(3.07 grams) and 170 joules. This is with a tuned gunpower stealth .

[@gregorkamensek3923]

That is a very respectable velocity. And accuracy?

[@georgealexandrurobu7075]

@@gregorkamensek3923 didn't have the time to test the accuracy as i was working for a new shroud and new valve. But i will test it these days. The image ibb.co/p3FKd4v PS : All this with only 210 bar.

[@hinterlight]

Any idea about how slugs like these would perform for .177?

[@gregorkamensek3923]

It is hard to say, the twist might be a bit too slow because of smaller diameter (smaller calibers require faster twists). I have design one version that may be available in the future for swagging. Also, casting is not the best procedure for small slugs, .22 is right on the limit where you can still make quality slug... It has to do with lead getting cold too fast and surface tension of the molten lead...

[@Dzm79]

Halo.I'm wondering if .22 slugs from that mold will work with my career mk1 707.I'm noob and you said that they are.223 or so ,I don't want to jam my rifle with too big ammunition.Ty

[@gregorkamensek3923]

They do fit career .22. I have tested it in my colleagues 707. He has it regulated and the power is much smaller that it comes stock, but is loaded and shoot perfectly. So if yours is unmodified, you should get high energies and good accuracy.

[@Dzm79]

@@gregorkamensek3923 Awesome I believe I saw them on eBay .If that's you who sale them i will get bo 4sure

[@jamesdenny4734]

Hello Gregor... do they make a hollow point mold ?

[@gregorkamensek3923]

No.

[@mongolmalitia1303]

Hi Gregor: I remember you said that those molds from mp molds will be out in March. I have sent them a few emails and I have heard nothing. I really want to buy all three of their slug molds. Do you know when it will come out?

[@gregorkamensek3923]

Miha promised in March. Hopefully they will be available by the end of the month.

[@dannybax1982]

In stock at the moment.... But you have to be fast , the .22 both sizes are down to like 20 pcs. The .25 version has like 60 left. I just ordered mine 😉

[@chrisabraham8793]

I wonder if you do light weight slugs for 12 ft lbs air rifles seeing as they are going to ban lead pellets in the UK.

[@gregorkamensek3923]

Sorry, I don't.

[@raymondwilliams1415]

Hi any moulds for high powered .177 eg sumatra because pile drivers and rabbit mag works poorly

[@gregorkamensek3923]

Sorry, no... But there will be swagging option later on.

[@mikebenoit6648]

How man jewel of energy do these homemade pellet s produce

[@hacksawinc3354]

Do you know if these work well in the Benjamin Armada .25

[@gregorkamensek3923]

I don't know. They need pretty high power and them might be a very tight fit.

[@richardstrombergoverkill5099]

I am sure you posted where to buy the molds;however I can not seem to locate that information. Would you be so kind as to let me know where to purchase them?

[@gregorkamensek3923]

www.mp-molds.com/product-category/molds/air-rifle-molds/

[@richardstrombergoverkill5099]

@@gregorkamensek3923 I ordered a .25 mold

[@dogbreath7777]

Have you developed any swage dies for these pellets.....in particular .35

[@gregorkamensek3923]

No.

[@mikel9162]

Using and Enjoying Altros Compressor from I believe your Country. Are you familiar with it? Knife

[@gregorkamensek3923]

Hi. Yes, I have a video about it, but it is not from my country, it is form Czech republic... Nice device...

[@redgum1340]

Gregor, what twist rate do you recommend for these slugs? I would like to buy a TJ .30 barrel.

[@gregorkamensek3923]

These slugs do not come in .30 cal, only .22 and .25. Best TR for them is roughly 1/16"

[@redgum1340]

@@gregorkamensek3923 If I were to swag my own slugs for a .30 cal barrel and around 80 gn in weight (round head and flat bottom), can you recommend a Twist Rate that would be accurate?

[@redgum1340]

@@gregorkamensek3923 Hey Gregor, would these slugs work in a .25 barrel with a Twist Rate of 1:10 ?

[@gregorkamensek3923]

@@redgum1340 They should if the barrel dimensions are correct.

[@Sertao2013]

There are no rings on the H&N Hollow points ,217 23 g slugs and they are very accurate out to 250 yards . So why do you think the rings important ?

[@gregorkamensek3923]

This video is relatively, old, the topic of rings is too extensive to discuss in the comment section. None of my K1 have ever shoot well with any of the commercial sagged slugs. I am happy if the do in your gun and I wish they would in my as well :)

[@PeakyBlinder]

Have you made a vid showing the cast slugs accuracy ?

[@gregorkamensek3923]

I have several videos with K1 as those are designed for K1

[@PeakyBlinder]

@@gregorkamensek3923 thanks for the information and sorry to bombard you with questions but it's good to learn from such a dedicated and in-depth shooter as yourself.

[@diantae]

what is the bc of the 5.55 .22 cal thanks I need it for a atn scope

[@gregorkamensek3923]

You can find this in one of my older videos, it is about .18

[@intheshadowsilie]

Could a Huben .25 cal shoot Hunter supply 48 grain slugs? Or is the too big

[@gregorkamensek3923]

Don't know yet. I believe the .25 have the same length limit of 11 mm. I will know more when I get the .25 k1

[@mikebenoit6648]

How are they in a break barrel

[@BisonWorkshop]

where do i get the pellet molds?

[@gregorkamensek3923]

links are in the video description below the video.

[@chadglover6593]

How do these fire out of the 25 caliber bt65 super tuned

[@gregorkamensek3923]

They work reasonable well but you need a lot of power.

[@danielzeng2285]

Hi Gregor,where can I get the swagging set that you mentioned? I will have a long shooting competition really want it , can you give me the web or email I can contact? Appreciate it, thanks

[@davorp.thismusicissofuckin1662]

I am in Los Angeles. Bought Huben .22 few months ago. Do you know from who I can buy some bullets?

[@gregorkamensek3923]

Well the mold is sold internationally so you can order it, but I guess you want to buy the bullets and not make them. I am form Europe so I don't know that much where you can buy in US. The options I know of (and there are a lot more for sure) is NSA: nielsenspecialtyammo.com/collections/22-caliber/products/36-grain-hollow-point-huben-pellets-223-caliber-air-gun-slug-swaged, airgunheaven.com/en/huben-22-solidpellet (they are for EU but they sell in USA as well), northamericanarms.com/shop/parts/cbb3/ (these will only work in V1 of K1 and they are a tight fit). These are the ones I know of.

[@carlosugarte1450]

Davor P. Joe Brancato sells the Huben and the ammo. at his shop in Huntington Beach . give him a call 714-907-0067

[@Ecowildlifesolutions]

I am interested in a set of molds for 25 caliber . Can you go I to details about overall length of your 25 cal bullets.

[@gregorkamensek3923]

It is about the same as .22 (10.9 mm)

[@thegreatoutdoors7610]

How’d these work in the gaunlet heard there good slug guns

[@gregorkamensek3923]

Probably not well as it is not powerful enough.

[@carlodessi5053]

Hi. which lead alloy do you recommend. Thanks Sorry for my English.

[@gregorkamensek3923]

Hi. I use 1/10 ratio of Linotype/Lead ratio

[@carlodessi5053]

@@gregorkamensek3923 thanks. have you ever made a video showing the procedure

[@gregorkamensek3923]

@@carlodessi5053 kzbin.info/www/bejne/rmq6hpuQZqiFopI&lc=UgxXjRLlvIWr2auqZPZ4AaABAg&feature=em-comments

[@carlodessi5053]

@@gregorkamensek3923 Hi. I ordered the mp mods. Thanks