Load Development Test Made Easy - Tips for Faster and More Accurate Testing

[@ErikCortina]

And to think you were a land chaser when I met you. 😂 That load is gonna kick some butt John! Good job. One small edit to my method. I don’t wait until accuracy falls off to move. I often test 0.003” and 0.006” forward of my current seating depth to see if my node has moved forward. If it has, I change seating depth. Goal is to never fall out of the node.

[@FClassJohn]

Thanks Erik and I always appreciate the help and constructive criticism, it’s how I (we) get better.

[@wambsganz8]

How many people think that Elon Musk has some alein space ship in a hugh airplane hanger he is trying to reverse enigineer

[@michaelajero2409]

You and Eric have the most useful and informative videos for rifle accuracy and precision by a huge margin. Thanks

[@FClassJohn]

Thank you, I appreciate that.

[@aaronarcher2356]

I like that what they say makes sense.

[@richardrisner3635]

+1 to that bro you and Eric have been my guide for getting into precision reloading

[@cjamonwilliams]

Yeah...these guys have improved my regular hunting loads exponentially. I'm not a competitive shooter, just like good ammo tuned to my weapon system. So watching these vids have markedly improved my loads and I even wanna take down some of the ammo I have loaded already and start over!

[@paulleeper3188]

Between you and Eric C I learn something new every video! Thank you.

[@FClassJohn]

Glad it helps!

[@matthewtracy8744]

The info you put out is straight up class room material!! Great info!

[@FClassJohn]

Thank you and glad it helps.

[@DarthLepard]

I never comment but this was a great video, really appreciate the explanation about how you bracketed the jump and why you chose the closest.

[@FClassJohn]

Thank you. I’m appreciate the kind words.

[@kevinpospesch3476]

Greetings from Germany and a happy and a healthy new year John I started longrange half a year ago. The videos from you and Erik are so informative. I have learned so much from you and at the same time avoided many mistakes. I started with .308 Blaser Tactical. Now I'm venturing into 300 WinMag. My wife surprised me at Christmas with a SAKO TRG 42. I now have work ahead of me. Sharing your experience, your posts will make the road much shorter. I learn from the best!!! Many many thanks. Kevin

[@FClassJohn]

Thank you and I really appreciate the kind words.

[@cjamonwilliams]

Absolutely love the fact that he's a Lefty shooting Righty..

[@davidgreer9567]

Dang those ES and SD would be awesome in a 5 round group. 30 rounds that's some serious consistency and skills. Nice job.

[@FClassJohn]

Thank you.

[@lovetoflylovetofly3843]

Amen!

[@o2wow]

Exact...ly, pardon the pun.

[@Strelnikov10]

Quick stats note: While you would expect ES to increase with an increase in sample size, that relationship is not linear, it's logarithmic. In other words, diminishing returns as you increase sample size. Regarding SD, you would actually expect SD, all things being equal, to become smaller as sample size increases. As your sample size increases, the distribution of scores aggregates more tightly around the mean. All of this, of course, is assuming a normal distribution. Given the dynamics of load data, we can safely assume a normal distribution of velocities. I'm a statistician and I'm thinking of uploading a "Stats Class for Shooters" course. Polling for interest... does that sound like something you would watch? Please respond either way.

[@davidgreer9567]

Sounds Well above my little brain but I'm definitely game to learn more on the topic

[@G5Hohn]

The velocity consistency is incredible.

[@rodocs7]

Thank you . You always make great videos!!!

[@FClassJohn]

Thank you for the kind words.

[@johnwesolowski8896]

Great vid and it truly inspires me to get deeper into reloading for rifle. I don't quite understand all the technical terms but through your video I can stop, look them up and thus learn a great deal. Thank you from a true newbie.

[@timg6252]

Great video John and a fantastic example of the accuracy required to perform at the top level of the sport. 1/3 to 1/4 moa elevation,, consistently. It's not bragging, it's necessary. At the 2017 WCs with with over 3500 points on the card the difference between winners and 1st losers was a whopping 5 points, 0.14% In FTR it was 3400 vs 3394, 6 points, all credit to Bryan for waiting. EVERY SINGLE POINT COUNTS.

[@FClassJohn]

Thank you and I appreciate what you said. It’s absolutely true. I shot a match last year where I shot a clean score of 600-34X and still wound up in 4th place. It’s a crazy discipline in that regard.

[@jeffclark9500]

I have heard this many times, but it just never fully made sense. I now am confident that I can make this work for me, Thanks.

[@paulgroniger4494]

Very thorough video and explanation, nice job John. Two quick comments: 1) The slightly lower velocity on day two may be due to temperature... 2) I will usually run two or three 3-shot groups for charge and seating dial in tests just to rule out human error (which never happens right?) or any component or load anomalies.

[@garycasteel277]

It would be interesting to repeat this exact test and compare

[@happyhome41]

This is a wonderful video - understandable and actual data. Thank you.

[@FClassJohn]

Thank you

[@desabc221]

You explain everything in simple turns. Everyone’s brains work a little bit different. Excellent stuff! You are going to cost me a lot of money!!

[@FClassJohn]

Thank you for the kind words and I'm glad my videos help you.

[@AlbinGwiazda]

Hello, congratulations on your great result. Thank you for the good lesson and best regards from Poland

[@FClassJohn]

Thank you and I’m glad you enjoyed it.

[@GianniG55]

Great video John, super consistent velocity spreads with groups to match the results excellent work ...nice..👍👍

[@FClassJohn]

Thank you.

[@longrange1114]

Great no-nonsense method. Also cool to see how seating depth had minimal to no effect on velocity and SD.

[@FClassJohn]

Thank you and you’re correct, seating depth has virtually zero if any effect on speed. It won’t unless you shoot some that jump and some that jam. Then you’ll see a slight variance in most cases.

[@ronnydowdy7432]

Enjoying the show and can't wait for the tuner show. Good information

[@FClassJohn]

Thank you and I'm working it on it now. Waiting to shoot a final 600yd target on Tuesday and then I'll post it.

[@GunWodan]

Thanks so much for sharing. It‘s a great pleasure watching you work. There is a lot to learn from your procedures and the way you draw conclusions for a novice like me! Amazing insight!

[@FClassJohn]

Thank you and glad it helps!

[@gylfif]

Wery informative video. Amazing es numbers. Thanks for sharing great professional tips.

[@FClassJohn]

My pleasure and glad it helps.

[@RetrieverTrainingAlone]

I love your teaching explanations!

[@FClassJohn]

Thank you

[@artbogden4958]

Awesome video enjoyed every second of it, thanks for all the advice and thanks for all the information. Priceless .🇺🇸

[@alphadogpredators]

Jesus those are some consistent velocities !

[@FClassJohn]

Thank you.

[@Jeff_Seely]

Happy Thanksgiving John and my wife is rolling her eyes at the sound of hearing your 30-shot segment coming out of my phone speaker as I watch this clip at the Thankgiving table. She's great because she knows I'll never change and she didn't kick me out yet🙄🤣. Holy Moses, those ES numbers are not what I get! I am like a sponge to this channel though and thanks for the videos from which we all learn and benefit👍

[@FClassJohn]

Thank you for the kind words Jeff and Happy Thanksgiving

[@bobbythompson3544]

So well explained, thank you Sir!

[@wendyheller8916]

Very informative. Great job.

[@FClassJohn]

Thank you

[@adeniranm7647]

Are you going to post a video of the tuner test? Would be interesting in seeing the next step. Thanks for sharing!

[@FClassJohn]

Here ya go. kzbin.info/www/bejne/bZy6f5hrqbR1m80

[@johnknouse8846]

That SD is amazing!

[@FClassJohn]

Thank you.

[@15TNar]

Great job explaining

[@FClassJohn]

Glad it helped.

[@wvlongshooter3912]

I eat this data up!!!!! I ran this same analysis yesterday, actually I’ve been running it for the past three days. I appreciate what you are doing !! Still scratching my head on the cbto’s changing on the driven loaded ammo, I think there are measuring tool and environmental issues changing my cbto’s slightly.

[@FClassJohn]

Thank you and glad you enjoy the material.

[@wvlongshooter3912]

@@FClassJohn Erik cirtinia was my first patreon and I’ll be one of yours as well if you go that route.

[@FClassJohn]

@@wvlongshooter3912 thank you. I’m working towards that.

[@rgthomson100]

Jam Secant and jump Tangent, 20 thou off great place to start for jump, works just about every time

[@oif3vetk9]

Always fun watching vids like yours and Erik's but us gas gun PRS guys live in a totally different world when it comes to handloading. Magazine length is real. lol I can get single digit sd's and low teen es but there is no starting that close to the lands and grooves. (At least with a manufactured barrel from say aero precision) It's all good though. That's just a thing you accept when you decide to take the gas gun path.

[@FalconXit]

Finished load development and the seating test. Don't own an EC Tuner but do have a Harrell's to try. Hope you post your Tuner video soon so I can try to get my .346 groups a little tighter in my 7mm08.

[@FClassJohn]

I'll try to get one done this week but here's my last video on the tuner. kzbin.info/www/bejne/bZy6f5hrqbR1m80

[@FalconXit]

@@FClassJohn Thanks F-C J, that gives me a place to start. The Harrel moves up the barrel instead of adding weight forward but the concept should still apply. Will know more on Friday. Always looking forward to your next video.

[@paulcupach8196]

Perfect explanation!!

[@johnswinkels4383]

Back in the waggon wheel days like 40-50 years ago the general consensus was to seat the projectile until it just touched the lands so I guess there is no bullet jump. The only downside is if you are using a high power there is no margin for error and pressure can escalate quite rapidly. I know that one of the reasons Sako idiot-proof their firearms is by machining the lands deeper in the barrel so magazine length does not allow you to do this.

[@cornydad]

Looks great to me. Thanks for the info.

[@FClassJohn]

Glad it was helpful

[@ironbomb6753]

I am wowed by your velocity numbers! Wow! I've never attained that kind of consistency. I will tho. 👍 Great video, again. 🙂

[@darrynjones325]

Es unbelievable 👍👍

[@stevenmartens6692]

Geeking out here .... good content

[@sonnyadams7894]

Mr. John, Starting off with "combustion/powder" testing, where are you seating the bullet? .009" ? Then for "seating depth" testing, begin .009" off as in this video? Just trying to figure the seating depth Starting point when performing the powder testing. Thank you sir.

[@tradermonk9403]

Thanks John! Have you filmed a video all about "Node"?

[@SnipeU696]

Thank you.

[@zeke1eod]

Very well done, awesome numbers, this is how accuracy should be chased. Extremely informative and helpful for us reloaders/hunters who want the best group to take accurate/ethical shots. Thanks for sharing, God bless

[@FClassJohn]

Thank you.

[@fasteddie4107]

Great stuff! Thank you.

[@FClassJohn]

Thank you.

[@tpalshadow]

Do you have a video on your powder test or do you just pick a charge, go up incrementally and look for a node, similar to this? Thanks!

[@melectrician]

Thanks for this, really good info but more so thanks to you and eric. I am a shooting coach and a prs competitor and i love the shooting sports for the exact reason you do the videos. Simply put no secrets, everyone helps you get better. Kind of a heres how i do it now with all things being equal, now try and outshoot me one the line 😂

[@FClassJohn]

Exactly. I’ve been really fortunate to shoot with some really good people who have the same mentality and I think it’s like a lot of things in life. I would rather train a lot of people to be better than me then do my hardest to keep everybody beneath me. My biggest rewards are when somebody that I’ve helped out shoots me.

[@Music-kz9ol]

Be careful of getting too close to the lands if you are going for velocity closer to lands equals higher pressure. Look at Roy Weatherby’s data, he loaded max powder and had the bullets .02 to .03 off the lands in order to reduce pressures, new bullet design negate seating depth issues. How close are your loads to max powder?

[@James-prs-uk]

Nice clean score can’t ask for more

[@FClassJohn]

Thank you

[@tiputipu777]

I would pick the depth in the middle just to make sure I stay in the accuracy node if I have slight fluctuation in seating depth accuracy

[@hrbricker]

In accordance with your post, I wonder how I can know for sure which way barrel wear will affect my position relative to the node. Will I be approaching the slope or moving away from it?

[@ReloadingQuest]

Enjoyed the video! You did a really good job explaining!

[@teo59]

Do you have also the powder charge test video?

[@20DYNAMITE06]

My brother and I are just getting into reloading, and your channel seems like a great resource! Thanks! BTW- I’m 99% certain we’re members of the same range. Hope to see you around!

[@FClassJohn]

Thank you for the kind words and hope to see you around.

[@davidgriffin1615]

@@FClassJohn Question: Where is the range you are shooting at located. Address Please.... Thank you

[@redteam9881]

It’s going rise up as the velocity increases it’s flattening the trajectory curve

[@johngoodwin2768]

Thank you for the very informative video. I might be blind, but I didn't see what type of powder you were using. Cheers

[@125saito]

Hi John. Thanks for this informative video. I was curious how or if you consider barrel fouling and barrel heat in your testing.

[@FClassJohn]

I always try to have a clean barrel, then run a couple fouling shots before starting. I don't focus on area heat as much as I used to but in a perfect world I just want the barrel to be in the same state as it would be during my matches.

[@125saito]

@@FClassJohn Great answer, thank you.

[@gunsmithy6188]

Fairly new to reloading and I do follow Eric’s videos but what I’m not understanding is the powder charge node. All I’ve done so far is chrono at jam minus 20 So if I want a round going let’s say 3000fps load for that speed at jam -20 then do seating depth test to tune it for accuracy. I’ve had great success with one load but I think I might just be lucky

[@gunsmithy6188]

@rpr6.5 creedmoor but what bullet seating height do you test your power at ?

[@gunsmithy6188]

@rpr6.5 creedmoor ok I understand now thank you

[@wowitslou]

Amazing video, this is gold to a noob. Thank you

[@FClassJohn]

My pleasure. I’m glad it helps.

[@mariusmusat1038]

Great video. Thank You🇸🇪

[@FClassJohn]

Glad it helped.

[@honcho714]

Gotta love a 3 holer.

[@2000willsome]

Great video, thanks!

[@FClassJohn]

Thank you

[@hrbricker]

See in believing, (I Think). I was surprised to see from your tests, that seating has so little effect on Velocity. I am an electronics technician with lots of familiarity with resonance. Thus I am vitally interested in factors which affect the exact position of a bullet with respect to resonance at the point of exit. I had thought that seating had a dramatic effect on pressure and thus velocity, but your tests seem to refute that premise. More thoughts later if I can find a way to make it sound sensible. Much obliged for your presentation

[@FClassJohn]

Yeah it’s very common to see no real velocity variance once you’re in the node. Of course there’s other factors like good brass prep that can have a big effect on velocity no matter how you’re testing so it’s important to have those pieces in place first.

[@toddb930]

Great explanation!!

[@FClassJohn]

Thank you.

[@davidschmidt5810]

Great video! One thing I found the hard way was not to trust the micrometer on the seating die because it measures from the point of the bullet and different lots have variances from point to ogive. But, I see you use both so all good.

[@FClassJohn]

Thank you

[@tika7mm]

Excellent as always John. I didn't see this being answered yet, maybe I missed it. Are you cleaning between every session? Thanks, keep it up!

[@FClassJohn]

Oh boy, the cleaning question 😱 Sooooooo I don't clean nearly as often as you would think. In fact I've only cleaned this barrel once around 30rds in so far and it's got over 200 rds on it.

[@Halfmilesniper]

My Model 70 hunting rifle that I bought 40 years ago was interesting. I scoped it for giggles when I got my borescope only to find 40 years of copper choking the bore. I did a video on the barrel and cleaning since this barrel had never seen copper solvent. I got a lot of flak from folks telling me how I had ruined the accuracy or wasted my time. Never mind this barrel was so choked it was causing accuracy issues and needed the copper cleaned out. My competition pistols get cleaned about every 1K rounds (a match weekend and practice).

[@paulmallery6719]

She is right on what the people want

[@Nonedw]

Nice videos and thank you for the time you put in this. Question: you mentioned that you have a problem with the vertical strings but not with the horizontal... why is that?

[@FClassJohn]

Because for the most part vertical indicates an issue with the load while horizontal is condition. I can adjust for condition but not for a bad load.

[@Nonedw]

@@FClassJohn Thank you. So a bad load can give you a vertical spread, but rarely a horizontal spread.

[@FClassJohn]

@@Nonedw i guess it’s a little conditional. If your horizontal matches the vertical then it’s still a bad load but when the vertical is a fraction of he horizontal then I can often feel comfortable that it’s conditions and same this with vertical being the load when the vertical is excessive compared to the horizontal. Does that make sense?

[@Nonedw]

@@FClassJohn Perfect! I have just started verifying my 6mm Comp Match load data at 300yds and 600yds. I am better informed now, thank you.

[@ericm3876]

Great information, I was going to ask about the remote trigger but saw the info in another comment. Thanks for all the great content, I am learning a lot! Between you and Erik, I am dialing in some good loads. Would like to hear your opinion on neck turning.

[@FClassJohn]

jklprecision.com/product/labradar-trigger/

[@skycam321]

Almost speechless, the information you presented and the way you presented it is exceptional. I have been doing similar development with powder charges for a few years, but never thought to do it with jump (and I have no idea why). The idea of staying a the front of the bracket makes total sense. I do have one question. Your sweet spot is at the very back of your test range so why would you not keep going to find out just how long that sweet spot might be?

[@FClassJohn]

Thank you for the kind words. As for the sweet spot, I could keep going but I’ve never really found much use in doing that and it can lead to a lot of waste barrel life and components. Sometimes less is more.

[@aga5979]

very useful information. I learned a lot. What is the machanical rest you are using?

[@FClassJohn]

This is an older video and at the time I was using a Seb Mini. I am now using a Seb NEO X.

[@leoburns9674]

Always helpful John... thanks for the education! Two questions: 1) what range do you do sight-in work (100m?); and 2) Do you have a commercial source for those targets? I assume you sight in to warm up to the center “X” and then dial down? Have a great day!

[@FClassJohn]

Thank you. I do all my development at 100yds. As for the targets here’s you go, just print them out and yes I shoot the X to reset my zeroes on the scope for the new load and then dial down for the tests. www.autotrickler.com/uploads/6/3/4/4/63444023/load_development_target.pdf

[@RickConnolly]

Excellent!!

[@FClassJohn]

Thank you.

[@charleswilson577]

Do you Always shoot that slow. Haha. Great video my man. Thanks

[@stevenewsom6866]

Does seating depth still make a difference if you are shooting something like an AR where maybe it’s not possible to get the bullet close to the lands? Say for example your mag length is 2.26 and the bullet doesn’t touch the lands until you have a 2.35 OAL.

[@jazzprakash7563]

Love the videos. You do a great job explaining all the different techniques. What is the purpose for de-priming first before you resize the brass?

[@jazzprakash7563]

@John Beige I gwt that part but why not resize and de-prime at the same time then clean the PP. I was just wondering because I see a lot of guys deprime before they reaize. just trying to see if there is a reason or just personal preference. Thank you John.

[@timfarley6493]

I always come away from one of your videos with useful knowledge, thank you. I have two questions for you. First where can I acquire the targets you are using, and second, you set your LabRadar back further from the barrel, and at a greater distance to the side of the barrel than LabRadar covers in their instructions. Please explain. Thanks for your time.

[@FClassJohn]

Here's the targets. www.autotrickler.com/uploads/6/3/4/4/63444023/load_development_target.pdf As for the Labradar, I use a remote trigger so it doesn't matter where I put the unit.

[@georgeholt8929]

Please, can you allow the viewers to see the fired cases primer impact with the firing pin, while we equate your seating depth? How much jump to the lands may have an affect on group size, it also has an affect on chamber pressure and those differences can be seen in the impact mark left by the firing pin on the primer.

[@FClassJohn]

I try next time but you won’t see anything. There’s so little variance in pressure across my seating depth test that they’ll all look the same.

[@georgeholt8929]

@@FClassJohn Perhaps my question would have been better suited in your video where your starting off with determining the powder charge you will use to determine your bullet seating depth. Since this video was the first one for me to view of yours, I’ll have to go back in your video development and watch your prior videos. Otherwise your very informative herein.

[@TL50-r9f]

How far away from the lands from the ogive do you seat the bullet when doing the powder charge testing?

[@briancobb978]

Awesome video always look forward to watching and learning, keep them coming. Have have you thought about doing some prs?

[@FClassJohn]

Thank you. I’ve shot PRS once but didn’t have the best setup for it. Maybe someday I’ll go back and give it another run.

[@rogerseymour560]

XLNT info, Thanks for posting. Who makes that Vise/Bipod that you are using?? Thanks again

[@FClassJohn]

Thank you. Here’s the rest therodzilla.com/product/t-rex-front-rest/

[@mtnman1]

With a rapidly as you’re firing, wouldn’t the hot barrel have more of an impact than your load development?

[@SuperOpinion8ed]

Thanks for the vid. Getting good info. One thing I see a lot and hate seeing is a lack of admission on the human factor. For example, you said “I take the data as data”. I’ve seen very low level shooters make assumptions about nodes based on three shot groups. They do 40.0, 40.3, and 40.6 gr (plus a lot more of course) and those three groups are 1.2, .264, .900. They assume the .264 is the node. No, if you’re groups look like that you got lucky on that group. Either you can’t shoot or your gun isn’t good enough. But the point is they assume everything is perfect snd therefore the data is pure. Obviously you’re experienced and are an accomplished shooter with high quality equipment. But on that group that wasn’t touching, is it possible the shooter cause the issue? I’m very humble and always try to call where I was aimed when the shot broke. At sub 1/4 that might be harder (I don’t shoot f class) but maybe that open group was actually your best consistency to mean the bullet hit exactly where you aimed each time and you put the 1/4” into the group. Great job regardless and I’m always a student. But my suggestion isn’t to round off the edges for bragging, but also don’t assume the data is 100% representative of the variable you’re changing. Mathematically we like to think everything is constant but seating depth but in reality it’s not. On a side note, I bought a neck sizing die and was planning on using it until I watched Eric’s vid about all the f class guys fl sizing. Guess it’ll stay in the box.

[@FClassJohn]

Thank you and you’re correct. There’s always a time to trust the target and a time to know you may have Influenced it. Shoot enough and you’ll know the difference. That’s also why we test and test and test to replicate results. You can rarely take a single result and trust it.

[@drolds7246]

Assuming you have a good idea of where tuner will be set, do you crank tuner all the way in to do the jump test, or keep it close to last known good setting?

[@diamon4u]

Hi John, what powder are you using and your 2.50 starting what are you measuring to?

[@johnkennedy6331]

Hi John, would you explain the layout of your target, how you use it and where to get it. Thank you!

[@FClassJohn]

I’ll do you one better, I’ll actually make a short video on it and post today or tomorrow. I’ve had several people ask so it makes sense to do a video explaining the situation of what I do.

[@johnkennedy6331]

@@FClassJohn Perfect, that would be great! Thanks again!

[@mitchjohnson7715]

I understand taking the seating depth closest to the lands for throat erosion. How much throat erosion do you usually see in something like 308? Thanks for the video

[@FClassJohn]

I don't know, I don't shoot .308 but in my 7prcw I get maybe .015" over 1000 rds.

[@mitchjohnson7715]

Thanks! That helps

[@csaa1980]

John, I know this is an old thread. As far as a starting point from the lands, are you just backing off from the jam point a couple thousandths? Thanks!

[@FClassJohn]

Yes that's all I'm doing.

[@zoidelux]

John, the numbers written on the targets, like 46… is that thousandths off the lands ? What do you do when you have no good consecutive groups before or after a good one? Lol 😂 get a better barrel? Maybe i need some Lapua brass, im using Hornady brass with who knows how many firings on it….

[@zoidelux]

Oops Never mind lol it’s your number on the seating micrometer…

[@jima1325]

Was there a powder test vid? I searched but didn’t see it. What seating depth did you use to find the powder node?

[@HarjeetSingh-ev8vk]

That ES was mind numbing .. but should you not have picked up the groups based only on side ways dispersion? I believe vertical is primarily caused by diff in powder charge.

[@FClassJohn]

Well here's the thing. I'm a big fan of loading for vertical but there's always a horizontal component to the load as well and while it might be a minor concern compared to the vertical I'll always take a more well rounded group over a super wide and flat one. But that's been a slow change for me to make and has taken some time to come around to.

[@amirdzaferovic3489]

Great video!

[@FClassJohn]

Thank you.

[@justinvandee2008]

Great video. Did I miss the combustion video?

[@FClassJohn]

No you didn't miss it, I've never done one. Perhaps I'll do one in the future. Thank you for the idea.

[@a-a-ron4679]

What do the numbers 25, 28, 31, etc on your target represent?

[@grantb555]

Why wasnt the velocity significantly higher on rounds seated deeper? My shorter cartridges always are faster with the same powder charge. Many thanks!

[@FClassJohn]

I have almost no variance in velocity when I do my seating depth tests. I've done lots of tests and I can usually run a seating test with 30 rds and have an ES under 20. Keep in mind I run very light neck tension which definitely could help contribute to that result.

[@madaxe79]

Interesting. I have always loaded for minimum jump. I always thought excessive jump was bad...

[@therevoman]

Question, is the space between shots "real-time"? That seems to be a quick succession of shots for gathering data.

[@FClassJohn]

Yeah those were all shot in succession with maybe 15 seconds between strings at the most. If I shoot more than about 25-30 rounds I’ll put my barrel cooler in and let it cool a bit.

[@therevoman]

@@FClassJohn well hot darn. Time to ditch my RPR for a real gun. ;)

[@davecollins6113]

Your editing of the test shots made me chuckle, gun going off with the bolt open and no hand on the trigger, couple of doubles even.. Nicely explained process, decent looking results too.

[@FClassJohn]

No, those shots are another guy on the range.

[@dannywarren5204]

How far of the lands is a good starting point for load development for small calibre rounds

[@FClassJohn]

Largely depends on the type of bullet being used but anywhere from touching to about .009" off the lands is where most people start.

[@35southkiwi16]

interesting. thanks