Multiple firings from the same brass POI shift.

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savage M110 BAS

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How anal retentive are you when it comes to fired brass. As of right now I have a ton of different containers filled with once, twice, third, fourth and fifth fired brass.

Does multiple firing from the same piece of brass change POI?
 
There are competitive shooters that use their brass 30+ times (with custom dies and annealing of course). Proper case prep makes the difference. Look for case neck splits or potential case head separation. If the brass is in good condition and you've loaded with OCD prep practices, there should be no problem (again assuming proper "re-loading" practices and brass prep).
 
In my experience it does not.

However, I have read that brass is most accurate on it's first firing and gets less accurate after that. This was information I got from a long range precision target shooting forum though, so keep that in mind. Those guys get all ramped up about a 1" difference @ 1000 yds. If you are a typical hunter or shooter, you will likely never, ever notice.
 
Northman999 said:
In my experience it does not.

However, I have read that brass is most accurate on it's first firing and gets less accurate after that. This was information I got from a long range precision target shooting forum though, so keep that in mind. Those guys get all ramped up about a 1" difference @ 1000 yds. If you are a typical hunter or shooter, you will likely never, ever notice.
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Not everything you read in forums is accurate ;) If that were true, LR competitors would only use new brass. Brass fire formed to you chamber will usually shoot better (neck sized with shoulders bumped back and kept concentric) but some competitors believe in FL sizing (but with custom FL dies that minimally size). The reality is that there are a million opinions on this and everyone has their magic brew ;) If you're not shooting quality bullets (with high G7 BC) you could get a lot of variation from that (more so that from the brass). Once you've ruled out the rifle, shooter, bullet, powder variation (largest effect) then it could be brass or primers. There are a lot of variables.
 
I have worn out 3 barrels and working on wearing out a forth barrel with the same lot of brass. FL resize everytime, but only bump the shoulder back .002. Have never annealled a case in my life.
 
maynard said:
I have worn out 3 barrels and working on wearing out a forth barrel with the same lot of brass. FL resize everytime, but only bump the shoulder back .002. Have never annealled a case in my life.
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I just bought a set of full length sizing dies and I was wondering about annealing the brass and if it was an absolute necessity..Guess that answers my question.
 
I recently started dialing in the bullets(not sure how long I'll bother with that, mostly just trying things), and found that I get less run out(about .002") with brass fired at least once, vs new brass(.004-.006"). So firing once does seem to even things out some.
I don't see how it would change more after that until it has done its useful life or been pushed too hard pressure wise.
 
First time I've heard that, same lot too? Do you not trim and lose material (especially with non-custom FL sizing dies) ? What caliber do you shoot? So wearing out 3 barrels means you resized the same lot of brass how many times? 10, 20, 100? Interesting...

maynard said:
I have worn out 3 barrels and working on wearing out a forth barrel with the same lot of brass. FL resize everytime, but only bump the shoulder back .002. Have never annealled a case in my life.
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Brass work hardens and competitive shooters that like to use their brass for 20+ times anneal for a reason. Is it necessary, for some apparently not. I don't anneal either, but also haven't gone beyond 5 uses on a case. I guess if you watch for case head separation and neck splits, hopefully should be OK...

paininthe10 said:
I just bought a set of full length sizing dies and I was wondering about annealing the brass and if it was an absolute necessity..Guess that answers my question.
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paininthe10 said:
I just bought a set of full length sizing dies and I was wondering about annealing the brass and if it was an absolute necessity..Guess that answers my question.
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In a custom chamber with adjustable dies so that you only have resize a thou or two...... Annealing is not necessary.

In a factory tube, with standard off the shelf dies...... You may have split necks after only 4 or 5 firings, unless you anneal the cases.

Annealing is one part black magic, one part OCD, one part metallurgy and one part opinion......

Personally, I anneal almost everything every 3 to 4 firings. I anneal if I'm going to be fire forming a IMP chambering. I anneal if I am returning maxed out brass to min spec (ie 308 brass fired in a M305)...... In a bench gun, match chamber, redding neck bushing dies, I don't think you would have to anneal a case.....

Ymmv
 
miykael said:
First time I've heard that, same lot too? Do you not trim and lose material (especially with non-custom FL sizing dies) ? What caliber do you shoot? So wearing out 3 barrels means you resized the same lot of brass how many times? 10, 20, 100? Interesting...
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Same lot of .308 Lapua brass. Started off with 1800 pcs and might be down to 1750 now. Of those about a half dozen were tossed because of split necks the rest were because of primer pockets starting to get a little loose. The lot of brass was sorted into 1 gr batches that ran from 170 gr to 174 with the largest portion falling into the 172-173 gr batches. When I go to larger competitions I try to take as much of the same weight as possible. This might mean that some get reloaded more than others. I am using a Redding S Type die with a bushing and bump the shoulder back .002.

I would think some of these pieces have been reloaded 10-12 times. About every 2 years I trim everything and resort/re-weigh.
 
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