Ditto on the wax buildup. My Mark IV magazines didn't play nice after a couple hundred in the cold. Beyond that, solid ammo.I like Aquila ammo. It performs well, BUT it is waxy. I get wax build up in nose of my Buckmark magazines, have to keep cleaning them or they fail to feed. It doesn't seem to bother my Marlin 795 magazines. The best stuff is Golden Eagle, but I can never find it.