I've run a Defiance Elite as the action on my main match rifle for a few years now, must be getting close to 15k rounds (4x 6 creed barrels and 1x 6.5 creed). Got it in the raw from Defiance (timeline on DLC was too long for my liking) and had the guys at Insite Arms cerakote it and relieve the bolt. It's been run in all kinds of conditions and just runs and feeds super smooth. If you run the bolt hard it really flings your brass though, haha.