WB
I like it on a rifle, not bad on a single shot
Monday, December 10, 2018, 21:04

if you absolutely have to get every FPS. I can tell you a chamber/break is far better at recoil reduction in a sealed breach application. Both are hellishly loud sounding or maybe it's the blast. I think the sound is spread out over a longer duration so it sounds/seems more violent. Ditto for those Mag-na-ports.

I personally think it is a waste on a revolver, but to answer I have never found proof that it slowed any velocity. A chamber/break takes about 2" worth of barrel velocity off for sure. I have video it gas shooting up through the ports so it has to help recoil some in a revolver, but I cannot tell it seat of the pants. You have a bunch of gas leakage at the barrel cylinder gap anyway. One of my main issues with Mag-na-porting a revolver is the mess it makes on the front sight ramp. It lead splatters the ramp something awful and is a booger to clean off. The various lead removal treated rags are the best for the chore, or copper/brass wool. I have a 1980's Mag-na-ported SBH .44 package gun that had a tight spot in the bore right behind the porting. I found it by sheer accident testing the theory of bore constrictions in relation to accuracy. This particular gun had crap accuracy no matter what I did, it was very discouraging. Using special pin gauges I found the constriction about 1.5" from the bore. I have lapped the constriction and accuracy returned (*but before being all the way removed!?). Shoots great now. I'd never say anything bad about their work, I never gave them a chance to address my issue, but it is the truth of my special situation. FWIW.