I've used only federal Bulk, I have never cleaned it at around 1800 rounds. It has never failed to fire, feed, or eject. Monday I let brand new never shot a gun before friends have at it (after some training). They couldn't jam it even when the ammo in the mags wasn't staggered properly. They love the gun, I can't say enough good things about it. It is insanely reliable, I'm going to let it go just to see how far it will run with just a drop of lube every 1k.

Accuracy wise I can't ask for any more. If I can get new shooters to hit an apple at 50 yards with iron sights standing in less than 10 shots and do it repeatedly.... this gun is amazing.