I just bought one of these myself. I was going to try an M2, but saved a little weight with the Vinci. I've got a Rob Roberts .655 and .660 to start with and was thinking of ordering a Jebs .650. It's going to be a couple of weeks before I can get out to pattern anything, but I'll update when I do. Please post some results if you beat me to the range. Also, I'm using a spare aimpoint comp M2. Just a heads up, even with a low mount, I had to add a little height to the comb to get the eye relief right.