Its really stiff opening or closing the bolt just after the first 1/3 (opening) or last 1/3 (closing). As far as the failures, ftf, ft extract, and ft eject. Often resulting in either the bolt not fully closing with a round in the chamber, round not extracting and a fired shell case half stuck in the chamber, and failure to eject with two rounds stuck in the action. I've tried using CCI's, some from those 550 bulk packs, and even tried some of that high dollar black box from wally world. But the bolt gets sticky even without ammo in it. I've also tried silicon spray dry lube, heavy duty grease, clp, and b'laster for lubes. The thing is just a POS jam-o-matic.