Just got back from shooting the rifle for the first time a bit ago. After 2 rounds my brother mentioned he had a headache all morning, and this was killing him every shot. Well, after 5 rounds, he told me to shoot the rest of 'em his headache was just too bad. For some perspective - The recoil as much, or a bit more than I expected, although when he was shooting it, it looked fine. It was more than both 50 BMG's I've shot, the Grizzly and the AR50 both. Twice what the AR50 was becuase of it's very efficient brake design, but very bulky too. Recoil got worse with the hotter loads, and should be pretty noticable when the get to 2400 fps or so. It recoils about like a light 338 Ultra with hot loaded 250's and no brake! Not quite like a 375 Ultra or 378 Wby, more of a big push though. It's not like a 300 WM or Ultra... Ruger #1 (early 80's model w/ adjustable trigger) 36" Pac-Nor barrel Custom design brake (extended Holland Quick Discharge variant) NF NXS 5.5-22 Farrel base (20 MOA + 6 MOA barrel taper) Leupold QRW's Custom made stock (shaped from 4"x12" blank)(not quite done shaping and finishing it) Harris bipod 500 Jeffery 750gr A-Max at 4.65" OAL - IMR4350 106-111gr 36-42k psi 1980-2180 fps H4831SC 108-112gr 31-34k psi 1897-1989 fps RL22 108-112gr 30-37k psi 1900-2065 fps We shot these in 1.0gr increments, 16 rounds in all. Pressures are still way low, should end up with 2350-2450 when they get up there some more. Here's pix of the rifle, and one of the current brake design. I say current because he's going to go build another one now that's a bit bigger and more efficient for this big boy. The extra set of slots in it over the Holland isn't quite as good as it could be. The new one will have more slots and might even be a lot longer with slots angled rearward too. Shouldn't be too hard to improve it quite a bit to at least 300 WM recoil levels.