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ammo/chamber/bolt/rifle question (Read 2711 times)
Baltimoreed
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ammo/chamber/bolt/rifle question
Jun 22nd, 2016 at 6:22pm
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I have 2 Krags, a NRA? carbine and a PC and only about 130 rds of used brass. To keep from overworking my brass I have split the brass between them and after an initial fl sizing am necksizing with a.308 sizer die. I have found that my PC loads will not chamber  in the nra but the nra ammo will go into the PC? However, if I swap out the bolts I can swap out the ammo. What's going on here? I want to pick up a box of new ammo to fire a few rds in each gun and then could measure the difference.
  
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Parashooter
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Re: ammo/chamber/bolt/rifle question
Reply #1 - Jun 22nd, 2016 at 9:09pm
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The simple answer is that one bolt/receiver/chamber is longer/shorter than the other. This is due to normal manufacturing tolerances. As long as you segregate cases, neck size, and stop swapping parts, the minor difference should be inconsequential.
  
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Re: ammo/chamber/bolt/rifle question
Reply #2 - Jun 23rd, 2016 at 3:29am
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Parashooter's advise is on target.  I have segregated ammo for my 3140 and some for a second rifle I am bringing on line.  I don't want to prematurely wear out the brass.
  
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Re: ammo/chamber/bolt/rifle question
Reply #3 - Jun 23rd, 2016 at 10:49am
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I agree also.  I have brass (around 150) that I only use with my sporter and cast loads.  All of my remaining brass is neck size only and used exclusively in my match 1898 (i.e. the rifle I use for all of my vintage matches).
  
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Baltimoreed
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Re: ammo/chamber/bolt/rifle question
Reply #4 - Jun 24th, 2016 at 3:18pm
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Thanks for the info. I wasn't sure if I had a problem with one or both of my Krags or my reloading technique. I didn't even think about the normal discrepancies in manufacturing 100 years ago. The first time that I have owned 2 centerfire bottleneck cartridge rifles in the same rifle caliber at the same time. You don't have this problem with .45-70s or .45 lc.
  
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Re: ammo/chamber/bolt/rifle question
Reply #5 - Jun 24th, 2016 at 9:18pm
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'Baltimoreed':

You can easily have different rifles in .45-70 and different revolvers in .45 Colt that will not allow fired cartridge cases to interchange without reforming the brass. Chambers for straight-walled are subject to manufacturing tolerances, also.
  
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