I have never been a fan of "any kind" of porting. The noise far outweighs the "comfort factor" achieved and, for me anyway, kills the resale.
I have a 3 inch S&W 686.."7" shot and I love to shoot it. No real recoil for my hands anyway.
Best, Capt. Chris
PS My "Hill Country" came with a screw-on muzzle break. The day I got it, I sent it down to riflesmith, Bruce Dow, and had a screw on muzzle "protector" made. Worked to:
A) Protect the exposed threads
B) Allow you to set the rifle "on" the muzzle with no wear or impact
of group
C) Get rid of the damned muzzle break!
CCS