I from what I've heard, most of the feeding issues are due to gun design, not the cartridge itself. Right now, I can't remember exactly which guns have had the issues, but I do know Kimber is one of them.
Most the feeding issues we saw were in Kimbers, Winchesters and Brownings. For the most part, the manufacturers seem to have the issue ironed out... havent seen one with feeding issues in quite a while.
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