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Old November 20, 2012, 12:12 PM   #10
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Join Date: May 9, 2010
Location: USA
Posts: 1,212
The issues seem to be mostly about bullet crimp. If a cartridge does not have sufficient crimp, the bullet will unseat itself during feeding. You don't see this problem as much in traditional designs because they are pushing the round forward into the chamber, so the bullet is unlike to fall out. Since the XR9 pulls the round backward, a good crimp is pretty important.
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