I’m embarrassed to say but Blazer brass 115 grain fmj. The only competition I’m in is with my shooting buddies. I only shot about 30 rounds through it, I focused more on the p09 since I put some Cajun love in it. The comped shadow ran 100%, but it was only ejecting the casing about a foot. So I’m guessing it’s on the brink of not running. I have to say I do notice a slight difference in flip. But I feel like it made more of a difference in volume. Boy it seems like it’s barking right in my face lol. I’ll be playing around more soon, as long as it keeps running I don’t plan to touch it. I could see i will be constantly adjusting the time. But hey, that’s okay, set screw comps scare me. I’d be worried about not getting them off or marking up the barrel.