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April 7, 2012, 06:59 PM | #26 |
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Join Date: April 13, 2000
Location: Northern Virginia
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"To me, the case appears to have been fired in an oversize chamber, or even a .222 Rem or Rem. Mag."
That kind of case fracture is not indicative of an oversized chamber, nor does there appear to be any case deformation. A split from an oversized chamber also wouldn't look like an aerial map of the Mississippi River. As I said, I've seen this numerous times in the past -- it's a flaw in the brass, either bad brass, an inclusion in the brass, or locked in stress that wasn't relieved during annealing.
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April 7, 2012, 09:59 PM | #27 |
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Join Date: September 3, 2011
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I've never had brass split like that but about 33 years ago I opened a brand new box of WW .357 Mag ammo and found that in 5 of the rounds the bullet was upside down. Of the 45 rounds left of that box 5 rounds wouldn't fire at all. I always figured at a box of rejects some how got out of the factory by accident???
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April 8, 2012, 10:43 PM | #28 |
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I had some Norma in 6.5 Jap do that. Headspace was ok, but chamber was oversize in diameter. I rechambered to 6.5x308. It was a rifle that dad picked up on the "Canal".
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