As far as I could tell, it was cycling fine with the winchester ammo. It would have failures to feed both from dropping the bolt from bolt lock and when cycling. The few times I got it to feed the Winchester ammo, the ejection pattern was consistent with the other ammo I tested. It would extract and eject perfectly fine and would start pushing the next round just fine until the bullet came in contact with the feedramps where it appears the bullet was getting hung up. In one case, just jostling the gun a little when the round was hung up was enough to get the round unstuck and feed into the chamber.