I recently picked up a mint stainless Mini 14 and love shooting it. I have one of the factory 5 round mags that came with it, and a pre ban 20 round aftermarket magazine. Problem is the pre ban mag sometimes fails to feed unless I have it positioned just right. I've heard of converted AR mags that people have problems with and I don't think this is one of them, just an old high cap mag made in the US that doesn't work too well. Is there any thing I can do to make it feed more reliably? I know its vague since I don't have a shot of the magazine to show but has anyone had experiences with aftermarket mags and had to do filing or tweaking on them?