I have been having about 1 in 100 rounds fail to eject from my 9 mm reloads, can't figure out why. The round fires and the case just stays in the barrel and jams as the next round trys to feed into it. Happens with both Bullseye and Unique powder. I am loading them on the "light" side for powder, but still well within the range. I do separate my brass and I get the same problem with WIN, PMC, Blazer, etc. Never have any issues with factory ammo, so it is clearly my reloads. Using 115 gr and 124 gr FMJ from several different companies, still get the same issue.
Mostly using a RIA 9 mm 1911, but also have had the same issue in my Glock 17 (though less frequent). Any suggestions?