Just fired off 60 rnds of Remington 550 from the new stick magazines. Went through the rifle like poop through a goose. Only 1 FT Fire (light strike). Put it back through and it went off second time around. If you insert a full magazine with the bolt closed it doesn't want to feed that round when you cycle the bolt. Since the bolt hold open only works with an empty mag in place it's best to retract the bolt, hold it open, insert the loaded mag then release the bolt. No problems this way. Woo Hoo!