Purchased my 15-22 ver.D on Thursday of last week. Shot 200 rounds of 6 y/o American Eagle ammo and had some failure to eject. Switched to some newly purchased Federal Ammo (Bulk pac), and shot 1050 rounds within two days. I cleaned the rifle once after the first 525 then shot the next 525 the next day. Proudly to say that not one Failure to fire and not one Failure to eject.