I bought a KKM barrel for my Glock 22 (40 cal). The first 40 rounds (4 ten-round mags), missfed about two-thirds through the 10 rounds (both factory Federal 155 gr ammo and my 155 gr reloads). It seemed to "break-in" after a while and I only got two more missfeeds next 6 mags. Do I have a problem, or can I expect the barrel to get "broken-in" or do I need to take it to a gunsmith? The copper jacketed rounds are jamming at the 7 o-clock position on the mouth of the KKM barrel. Any ideas or suggestions?