Mag-na-port
Hey 9 mike-mike:
I have tried mag-na-ports on a couple of revolvers, .44Spl 624, and .357 686. Both have longish bbls, 6.5 and 6.0 inch respectively. I first tried them on the 624 and when the revolver came back I shot a ported gun side by side with a non ported one. I'd have told you I couldn't tell the difference. Later, though, I used the ported gun at a pin match and the results were pretty conclusive. Subjectively, I didn't see any difference but an objective measurement with a timer told the tale.
When we went to the 686s to get the 7th round I got my bride's gun ported first, then did mine and had a good opportunity to compare performance on pins and at some man-on-man steel shoots. There is a significant advantage when follow on shots are needed.
Cheers,
Norm
PS They do good looking work and the turn around is good too.