I had one done on my encore 308, since wanted to keep barrel same length mine is more of an integral porting i guess u xld say as is bunch strategic holes drilled in end...of crse cant remember who did it...maybe mgm?
Anyways greatly reduced recoil as can use a riflescope......BUT you can never shoot without hearing protection as you wld be deaf..even in hunting situation. It also makes a bit of muzzle blast depending on where/how shooting. End result is very little felt recoil.