Dude, that has always been a problem with the CZ's. Rough feeding ramps and sometimes chambers. Of course if the magazine springs are weak, how're you going to chamber a round reliably? If I were you, I'd only massage it so much. I think a better course of action would be to send it to Brockman and get a completely different rifle back. Nothing in life is cheap but I think the use of an expert is the only way to go.