looking for some advise from re-loaders. I'm just getting back into reloading and started making 9mm. I am 90+% there. Ammo is very accurate and everything is rolling along good, then 1 in 50 rounds is a failure to feed. It checks out in a case gauge and only thing I can guess is its a crimping issue that is just a hair off. Why 1 in many rounds do this. I'm using Berry's 124 RN and mixed brass that has only been fired once. I've adjusted the crimp just a little more and will see how these 100 hundred perform, but would like any info from guys that know. I don't have cartridge specs in front of me as I write this but I know its sets up within guidelines of my manual specs as I checked with each stage of setting the dies in a 550B. Thanks..