Case Volume / Headspace & Its Effect on Velocity – What’s Practical Accuracy? – VR to Tim R. (PC Bullet Empire)

Velocity Deviation, Its Relation To Your Brass Case Capacity – VR to PC Bullet Empire

Headspace plays a huge factor in velocity. But what’s practical accuracy? And does velocity deviation really matter?

This is a VR to Tim R. @ PC Bullet Empire video HERE

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mike1
mike1

What Hornady comparator bushing are you using to measure headspace. The reason I ask is because I load huge volumes of 6.5 CM and my case measurements of a fired case are around 1.539 +/- .001. I use the .400 bushing because SAAMI shows it’s drawing measurements at .400″ on the neck. So please explain! Also, as a serious handloader, I only neck size bolt action brass and bump the shoulder back .002″ to allow for bolt closing without resistance. My bolt action loads have ES averaging 9.0 and SD’s at around 5. I also neck turn all brass after… Read more »

insightfreedom
insightfreedom

Just trying to show support over here as well as over “there” 😉 I learn so much from watching you. Have you used the Mica dry lube that Midway sells?

The Range Squirrel
The Range Squirrel

Has it been your experience that similar weight cases from the same manufacturer have similar water volume (as determined by weight change empty to full)?
In other words, with Starline for instance, might one select groups of cases entirely by weight of processed brass (shoulder bumped and trimmed) for acceptable or better accuracy out to say 500 yds?

Thomas Pickering
Thomas Pickering

As I said on the “other place”, this is definitely a “keeper” video. Good info well presented. Thanks!

noshot
noshot

super video. really nice handwriting. lol how do you like that mec press? I am just starting to load 6.5 Grendel but first I am redoing my bench. (big project.) again really like the vid. very informative.

Mario Mosin
Mario Mosin

Wow very interesting video, a question can neck turn also happen with pistol brass? When you say neck turn what do you specifically mean?

karlb
karlb

Good stuff Mr. Eye… I think I know what neck turning is.

CharlieBrassStuffer
CharlieBrassStuffer

Outstanding Kenny…just friggin outstanding!

The Big Man
The Big Man

Excellent video and extremely informative. That is some really great information. I cannot wait to try to put this information to use and see what I can do with it. Thanks again for taking the time and putting this out there.