Looks like there's a lot of problems with the 64 mags. Mine is a little weird, I think. 9 of the 10 run without a hitch, BUT the last one catches on the chamber entrance - looks like the bullet hits the bottom of the chamber. Read about loading fewer so I tried that - no joy. Even if I put only 2 in the mag, last one jams. I've used CCI Blazers, Mini Mags, and Stingers, Remington Yellow Jackets, Winchester Xperts and Armscor. And I did clean the rifle before trying again today. This has me stumped - always the last round. Any suggestions?