@rrp said:
Quote:
Maybe too much crimp? All you need to do is take the bell down when crimping. I hope this helps.
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I don't reload 9 mm Luger, but I've had a problem with overcrimping in .40 S&W. It resulted in a slight bulge that was still large enough to affect the angle that it exited the magazine from. This caused maybe one in five rounds to jam.
I discovered that I didn't need to bell the mouth of the case to seat bullets. I discovered that I didn't need to crimp either. The problem went away.