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45 acp brass

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Bullseye-L Forum :: Ammunition Discussion

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Post by troystaten Wed May 01, 2019 10:10 pm

I was reloading a batch of ammunition and I noticed some of the brass was a lot easier to expand after I sized the cases so I looked at those cases and they all were IMI brass so I measured them with calipers (I know a micrometer would be better) and the IMI brass consistently measured out at 1 to 1.5 thousands thinner.  Don't know if that will make a difference in accuracy but I had not noticed it before.

troystaten

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Post by BEA Thu May 02, 2019 10:45 pm

I use the same brand brass for 50 yd loads.  For 25 yd loads I don’t mind mixing brass.

BEA

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Post by troystaten Fri May 03, 2019 12:17 am

Makes sense, BEA.

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Post by 243winxb Fri May 03, 2019 9:55 am

Mixed brass  makes a difference.  I took 5 different headstamps. After sizing/expanding  , spring back was different on each.  

Test showed  the pressure to seat a bullet varied   greatly.  From 45 lbs to well over 100 lbs.
243winxb
243winxb

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