Barrel twist v Bullets, some things to consider

[@neilgoodall1768]

Great video, put across really well. I have been reloading for many years and you never stop learning about the art.

[@markandsamafterwork]

Cheers Neil, thanks

[@warbirdflyerF4U]

Another great layman's term explain explanation for those out there that don't really understand Twist rates and their effect with different length and weight projectiles keep up the great videos enjoy watching you and Sam

[@markandsamafterwork]

Thanks Matt

[@Nfbotha]

Your interpretation about your findings and logic makes so much sense. Great informational video! thank You for the content!

[@markandsamafterwork]

Thanks Man, cheers

[@scottnj2503]

Brilliant explanation. Relationship of twist and velocity have been a mystery to me. Thank you.

[@markandsamafterwork]

Cheers

[@Leverguns50]

This is the kind of stuff I really like to hear about, because a lot of people don’t understand it and this will be a quick video I can point them to, to help them understand it, Thank you so much for sharing

[@markandsamafterwork]

Thanks man. glad you liked. Cheers

[@sterlingwilkey2124]

Mark your amazing, iam not the smartest person but the way you explained it I can even understand twist rate better now

[@markandsamafterwork]

Thank you Stirling, Cheers

[@robbieatvic]

Great content thanks for sharing

[@markandsamafterwork]

Cheers

[@walt5797]

Thanks Mark and Sam, this tutorial all made a lot of sense and answered a few question for me.

[@markandsamafterwork]

Awesome, Cheers

[@davidhandyman7571]

More information, logic and understanding in an understandable package. Thank you Mark.

[@markandsamafterwork]

Cheers Dave

[@Gubson]

Really interesting. Thinking of Withworth how he came up with his 1:20 twist rate for his bullet and barrell. That at a time when rifled barrells was quite new.

[@markandsamafterwork]

Cheers

[@CaptShocker]

So much to pick up from this. Going to have to watch this a few times and take notes. Appreciate all the lessons. Cheers.

[@markandsamafterwork]

Cheers Wayne, thanks

[@tommysaulter9171]

Mark... The more I listen to you explain the science behind LR Shooting, the more I realize I should have paid more attention in Math class in school...!!! Now I’m 2nd guessing my 1:10” barrel for shooting a 300WSM... Thanks for your valuable information...!!!

[@markandsamafterwork]

Cheers Tommy

[@secrestbruce]

Always enjoy your content. Keep up the great work.

[@markandsamafterwork]

Thanks Bruce

[@LabRatJason]

This topic is perfectly timed for me. This weekend I’ll be testing 230gr A-tips in my 300wm with 1:10 twist. They shot fine at 100 yards, but now we’ll be testing them at a mile. I was worried about the box recommending 1:9 but I was hopeful I could get away with it.

[@markandsamafterwork]

Cheers Jason

[@stacykenyon5863]

Good info. Had a batch of rounds disintegrate on me a while back. Some tried to tell me I was just shooting the ground and bullets were breaking up, they were definitely breaking up after leaving the barrel, there was a big pop and smoke.

[@markandsamafterwork]

yep, can happen, cheers

[@GRT1865]

Thank you for the insight. Nice video as always. Stay safe. Take care. Have fun. 😎

[@markandsamafterwork]

Cheers gary

[@nickfranklin1867]

A very interesting video Mark, I don't shoot ELR, I'm just an average gun enthusiast, but the ballistics fascinates me, keep the great videos coming

[@markandsamafterwork]

Thanks Nick

[@walterluiz4694]

Great lesson. Thanks, cheers my friends.

[@markandsamafterwork]

Thanks Walter

[@hotchihuahua1546]

With the variety of pistols & rifles I have It comes down to what manufacturers rounds shoot best out of my barrels . The problem I have is two fold . One - getting those same rounds when I run out . Two - (most importantly ) remembering to write down what shoots best in what . 😁 Appreciate all the hard work y’all do in making these videos .

[@markandsamafterwork]

Thanks Man, and Lol, Cheers

[@jimklemens5018]

Have you considered making your own ammunition?

[@patdennis3751]

Great info. I think another factor In bullets exploding after they leave the bore is friction. The friction, combined with an already hot barrel tends to anneal the already relatively soft, thin copper jacket making it that much more susceptible to stretching and ultimately rupture as the centrifugal force on the heavy core presses outward against it.

[@markandsamafterwork]

Cheers

[@colinreid7305]

topic was well explained and very interesting even for a person like me who is not a long range shooter.

[@markandsamafterwork]

thanks Collin, Cheers

[@MelvinHunt-iu8tv]

I have a tikka t3x super varmint 223 ( 1 in 8 twist ) 24 " barrel ... I'm putting 5 shots in one hole at 100 meters with Norma bullets ... Great and accurate gun

[@markandsamafterwork]

Cheers

[@jcarne1015]

Thanks Mark. You just answered a couple of questions that have been bouncing around the back of my mind. I consider myself better educated than the average dummy, but always learn something from your videos.

[@markandsamafterwork]

Thanks J, Cheers

[@thomandstacieverroad8417]

I Experienced bullet disintegration with a 110 grain tnt varmint bullet out of a 7 mm rem mag hand loaded quite hot. I was so confused as to why there was a puff of darkness about 3 meters past the end of the barrel every shot and I couldn't seem to ever hit the paper. It was about 15 rounds of me scratching my head before that idea dawned on me and your the first to confirm it . Thanks 👍 I thought I might be nuts.

[@markandsamafterwork]

Thanks Man, Cheers

[@USAACbrat]

We used to see that with 6mm International if the rifling cut through the jacket the core comes out.

[@markandsamafterwork]

Cheers

[@longrangeshooterCAisa2aabuser]

rifling mate rifling but you know your guns I watch your videos liked the one on bullet shape very informative

[@markandsamafterwork]

Cheers

[@markanthonystringfellow3923]

Exceptional Breakdown Mark!!!

[@markandsamafterwork]

Thanks Mark

[@neckstumping]

Great stuff again. Cheers

[@markandsamafterwork]

Thanks Man

[@stanrothfuss2737]

I listen to 98% of KZbinrs and it's just an echo chamber of people repeating other people's bullshit. A lot of them say they're not getting paid but I hope they are because they're just parrots for whatever is the new thing. This guy is so much more thoughtful, balanced and approaches the subject in a serious manner. I really appreciate his ethics and intelligence. I usually learn something I have never heard anywhere else. I had gotten so sick of watching videos in which I had to stomach the "creators" favorite rock and roll song from his not to distant childhood playing in the background, as I am subjected to selfies of ammo dumps or long range shooting clips that the subject tries to use jargon he seen in his most recent sniper Hollywood movie. Great job to both of you.

[@markandsamafterwork]

Lol, thank you Stan, glad you like man, Cheers

[@nataliedeyton6829]

I have been seeing some 1:5 twist short barrels for the 300 blk now Just for those big heavy projectiles. But I’m sure you are aware of these 😂. Appreciate these videos 👍

[@markandsamafterwork]

As explained, cheers

[@fredfleming2455]

Hi Mark, still trying to find time to hone some skills at shorter ranges, but this has provided some excellent info for when i progress into longer stuff.. thanks heaps.. fred

[@markandsamafterwork]

Cheers Fred, thanks

[@Jerry-Parker]

Excellent information , I always enjoy your videos ! 👍

[@markandsamafterwork]

Thanks Jerry, cheers

[@davegrimshaw7318]

Thanks Teach,another lesson learned, in layman's terms as well, never been explained as well as this 👍👏🙂

[@markandsamafterwork]

Thanks Dave, Cheers

[@USAACbrat]

it is good to be included. i shoot targets at 100 yds off a bench at a State of Florida, park range, off a concrete bench. i learned that the 300 whisper was very accurate; compared to other .308 cal. 16" barrel, 1/8 twist, loves 90 gr thru 130 gr bullets, on a good day less than 1 min. about 2100 mv. interestingly looses 200 fps in 100 yds.

[@markandsamafterwork]

Thanks Man

[@practicalamerican8152]

Thank you for the great advice .

[@markandsamafterwork]

Thanks Man, Cheers

[@JohnRoberts71]

Great content thanks for sharing, very informative

[@markandsamafterwork]

cheers John

[@duanehawks9405]

Great explanation mate!! Gettin that long range, Australian, education. 🤙

[@markandsamafterwork]

Cheers Duane, Cheers

[@danieldillon6005]

One thing I'm looking forward to trying is 1in3 twist subsonic at 500 yards with 8.6blk

[@markandsamafterwork]

Agreed, Cheers

[@scottrussell6717]

Great information for newbies

[@markandsamafterwork]

cheers

[@gerrittenberkdeboer7763]

Good explained. Thank you.

[@markandsamafterwork]

Cheers

[@duggydo]

That pop you are talking about was fairly common for the 224 valkyrie. Iraqveteran8888 has a video where they caught it on camera. Thin jacket bullets and super fast twist will definitely do that.

[@markandsamafterwork]

Yep, sure does, Cheers

[@chrisgabbert658]

👍 this explains why my rifle isn’t very accurate with a lighter bullets.

[@markandsamafterwork]

Cheers

[@irelandsailor]

Great video. Im thinking of making a .22-250 with a 1:7" twist so I can shoot 90gr.bullets.

[@markandsamafterwork]

Awesome, Cheers

[@gc641]

Good one mark

[@markandsamafterwork]

Cheers

[@mefirst5427]

In the Hornady book, for 220 Swift, it warns of bullets disintegrating for the 35 grain projectile.

[@markandsamafterwork]

Cheers

[@joeschuster2837]

thank you well explained

[@markandsamafterwork]

Thanks Joe

[@biggiet1041]

As always...great info. Thanks again

[@markandsamafterwork]

Thanks Biggie, Cheers

[@randomidiot8142]

Probably one of the best videos on the topics I have heard. Have you noticed a correlation between case volume and barrel bore volume when it comes to picking a good barrel length for optimum performance?

[@markandsamafterwork]

Thanks Man, sorry I don't offer more than the videos, Cheers

[@walterzimmer1352]

Good job

[@markandsamafterwork]

Cheers

[@nickwilliams6869]

Im new to the twist rate i havent had a rifle sence i was a kid but didnt know about the twist rate

[@markandsamafterwork]

Cheers

[@USAACbrat]

I am a 300 BO shooter,

[@markandsamafterwork]

Cheers

[@moshkid16]

Will a slower twist rate will reduce spin drift over a long distance?

[@markandsamafterwork]

Yes but spin drift is not of any concern

[@Allen338LM]

What's your thoughts on gain twist? If I missed it I apologise but I don't know if you said about it and would like your thoughts on it

[@markandsamafterwork]

We have a video on that

[@neckstumping]

Artillery has used your theory on stability for decades and decades. Youre on the money. Artillery projectiles follow the arc like you say.

[@markandsamafterwork]

Cheers Man, thanks

[@Dr._Spamy]

Would be curious to see if a projectile really tends to align with the line of trajectory on lower twist rates, or if it just starts to tumble easier. On the other hand key holing can't be good either. The only thing that can't hurt is a more flat trajectory.

[@markandsamafterwork]

Cheers

[@imeprezime1285]

There's no key-holling with appropriate twist and well made symmetrical bullet

[@lawrencejones5640]

The pop from the 22-250 is the only round I've come across that's made me flinch

[@markandsamafterwork]

Lol, cheers

[@lawrencejones5640]

@@markandsamafterwork mind you, only when others are shooting it

[@katrinadarling3271]

I would think that the faster the barrel spins a bullet, the higher the skin temperature the bullet would have when it exited the barrel. Do you have any idea how hot the bullet gets? I know metals lose strength as they get hotter. If the bullet skin temperature approaches the melting point, it might explain why the bullet seems to disappear. The remaining bullet mass may fly off in some random direction.

[@markandsamafterwork]

Cheers

[@Pilottoproperties]

When I put my .22-250 with a 1-14 twist into the Berger bullet stability calculator .242 bc 50 gr. I can’t seem to get any stability to work without getting a different twist rate. Running at 3,700 fps. Can I do anything besides new barrel? Gun is a very nice Thumbhole Remington 700 with fluted barrel. I’d prefer not to replace a newer barrel but per the calculator I appears nothing is truly stable in the firearm. Any thoughts?

[@markandsamafterwork]

That twist is set up for off the shelf ammo, so maybe try to shoot some bullets and see, 50 and 60grn bullets should be fine, Cheers

[@Pilottoproperties]

@@markandsamafterwork thank you!!

[@Allen338LM]

What's crazy looking is the 8.6 blackout there barrels are 1in3 or 1 in4 twist looking down barrel it looks like screw flutes

[@markandsamafterwork]

Lol, Cheers

[@kuronyan3006Ackley]

👍💡🎵🎶

[@markandsamafterwork]

Cheers

[@kippamip]

Just to prove marks point on the projectile not loosing RPM at distance, here's a fun vid to kind of prove that. kzbin.info/www/bejne/i6isoalvaayDqpY

[@markandsamafterwork]

Cheers