I've had a few failures to feed with Freedom Munitions 124g hollow points in my M&P Pro. The bullet hangs up on the upper surface of the breech face. It happens randomly in the middle of the magazine, and all the magazines seem to be identical. At least no observable differences. Since this was only happening with the 124g HP rounds, I measured 5 each of the HP and round nose rounds. HP's were 1.060 +/- .003. Round nose were 1.150 +/- .002. Is the length of the hollow points about what would be expected?