JFrank
Member
Spring back sounds cool but hard to measure and not much of a factor when sizing.
Problem with neck tension
- Thread starter ballenbrowning
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I have reloaded many "once fired" 308/7.62x51 ( and likely some "machine gun fired") brass with my plain old Lee dies. Brass was never problem. I would suggest rechecking die setting, and measure bullets, expanding ball, and if possible measure case mouth ID post sizing w/o expander ball and with expander ball. Also check the headstamps to see it the problem is with a specific case...
AJC1
Member
Well considering every piece of brass I shoot is recovered that's not true in my case at all. Were not talking about a little bit of one caliber either.
Charlie98
Member
I've reloaded some commercially processed 'once-fired' military 7.62mm brass (likely some, if not all, machine gun fired) and had no end of problems with it... so much so, that I wound up scrapping 2K cases, and initiated the No One Else's Brass Policy. Sure... it resized great, but that wasn't the problem.
Everyone has their own expectations and experiences, and their own level of assumed risk. 60000 PSI right in front of your face is no joke, I don't cut corners.
Varminterror
Member
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Super simple to measure if you are willing to sacrifice one piece of the problem brass. Measure two pieces of brass. Hillbilly anneal one piece of brass to dead soft, size it. Size a non-annealed case. Measure both and compare to the original dimensions. Bingo, springback is quantified.
Ranger99
Member
^ ^ this ^ ^
The trouble I had was costing me valuable
irreplaceable time. If I can make my new
out of the box brass work with my old
regular dies and no extra effort, the problem
is definitely the brass and it gets smashed
and scrapped. No sense ( to me) spending
10-15-20 minutes trying to nurse one brass
case and maybe it will work, maybe not.
Of course, anyone can do whatever they
wish, and I'm sure there are those that
want to spend their time diddling with
stuff like that
AJC1
Member
Some people have time and no money, others have plenty of money and very little free time. Never assume your situation is anothers....
The Glockodile
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Common things being common, different neck thicknesses is most likely.
“Brass Springback” does seem to exist.
My little tidbit of experience involved CBC brass, all annealed (Tempilaq calibrated - not the best, but bubbagoodenough).
I remember the batch distinctly as it involved some beautiful 155gr Scenars with pre - Varget IMR 4064 (notice that this narrative involves the pronoun “I,” meaning take it with a grain of salt along with all the rest of BubbaTech hearsay).
Everything was perfect the night before. Selected for neck thickness (yes, I have a really awesome Tube Micrometer with the appropriate surfaces for this kind of thing), measured for projo concentricity, etc. - meaning yes, I fondled all the tips! All of them! Because if you've actually seen and held Scenars, you know you must!!!
The following morning, I noticed that not all points were at the same level... Guess what! Some of them were loose enough to lift out of the necks!
Like, no way! Impossible!
But yes, it’s real...
Some brass really does suck for handloading.
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ballenbrowning
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- Dec 21, 2008
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I looked at the brass tonight and it is all different headstamps. I am pretty sure that is the problem. I will try to borrow another 308 die to check and see how that acts. Again, I appreciate all the input I have had from you guys.
JFrank
Member
Interesting but i thought we were discussing work hardened brass having spring back ? i recently varified a bushing ID at 263 prior to sizing a case on my neck turned brass that have probably ten reloads with zero annealing and now after a couple weeks they still show .263. Perhaps more difficult to monitor on non bushing dies, I can't speak for guys that have annealing results but I'm not seeing any spring back to speak of.
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Varminterror
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Looks like you’re not having any trouble measuring springback...
JFrank
Member
Well at least on this brass, I really have no idea how annealed brass would react to the same mini test or if it would even be a thing. Might be a good winter project. Thx
AJC1
Member
I would bet not as it's the best of my range pickups. Best uniformity and Winchester is the worst.
ballenbrowning
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- Dec 21, 2008
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Winchester was what seemed to be the worst and that's what the 2 pieces was that you could slide the bullet in and out of after sizing.
Blue68f100
Member
Did you by chance disassemble both dies for cleaning? If so make sure the internal parts did not get swapped. Expander stem in the seating die body. The die bodies are cleanly marked so it should be easy to verify.
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