Should have replied back to this topic a month ago...sorry for those who were wondering what I found. Bottom line was that the Hahn mag block needed some attention. I swapped out the one I was using for a different Hahn mag block and everything went right back to working again. I've shot four matches with it now and no FTF at all. I also tried out a Macon Armory mag block(also the same one that KAW sells, it's made by the same shop) and it works great also, except for a little tight on some of the metalform mags. Talked with the guys at Hahn and they have had some mag blocks that had been worn out(a complete surprise to me) but at a much higher round count that I had(15,000 rounds). Mine was not worn out, but needed to be readjusted in the mag well, and I polished up the feed ramp a little with the dremel tool. Good to go now.