I have to smack my C9 in the aft end of the slide to get the first round to chamber. Not fun any more. So I got my C9 back from MOM after a barrel swap some misc cycling probs. Now it hits the target and cycles great; except I get a lot of first round hangs when I rack the first round and I have to smack it the a... Thought this would go away but it has not. Never a problem with auto chambering a round after firing. Yes I rack it all the way back. And I've tried slamming the slide back hoping the bounce back would chamber the 1st round. No luck. More ramp polishing? Mag lowers? Spring?