Very good at reducing recoil on a .308 rifle - Ruger Rifle Hybrid Muzzle Brake

I bought one to replace the factory flash suppressor on my Ruger Gunsite Scout Rifle in .308 with a 16.1" barrel. I used a T-60 socket and battery-powered impact wrench to remove the flash suppressor then installation and indexing of the muzzle brake was easy using the supplied jam nut and an adjustable crescent wrench. Felt recoil is significantly reduced--I estimate 30% or maybe 40% less. Apparent muzzle blast is markedly increased if in an enclosed shooting bay. When I shoot it at a range with open benches, concrete floor and wooden roof about 10' overhead but no side or back walls, I don't notice the increased muzzle blast, or at least it doesn't bother me.

But when shooting in an enclosed shooting bay with concrete floor, cinder block walls (bay space is 36-40" wide) and wood roof 8' overhead, the muzzle blast is very loud and annoying, possibly due to the shorter barrel on my rifle. In the open bay the shooter 3 benches over could feel it, but nobody was complaining. In the closed bay, the blast was bothering me a lot even though I had both ear plugs and some cheap ear muffs on. I think it was because the end of the short barrel did not protrude beyond the side walls so the pressure wave was bouncing off the walls, floor and bench to ring my sinus cavities. But the solid side walls also prevented the muzzle blast from bothering the other shooters. Going forward I'll use this at an open shooting bench but not in an enclosed shooting bay, and I would recommend not sitting at the bench right next to someone using it on a 16" barrel. Looking forward to trying this on a longer-barreled .308 rifle.