Mo' Magazines

Recently I was able to turn a couple of "bad" mags into 100 percent Good mags by carefully comparing how loaded rounds 'sat' in them vs known good mags, and tweaking the feedlips to match. Even more than 'brand' of mag or 'follower' style, I believe the feedlips are the most critical for proper feeding... a few thou in the right direction can be the ticket.
My mag issues were obvious... straight-line feeding right into feedramp. Gave the rounds more upward nose angle to match the good mags and viola`...