Cause I hold a rifle very light, and tend to be a stock crawler for me mag na port works very well with rounds like this.
Dober
It is my understanding that porting of most any kind (mag na/brake) becomes more efficacious as velocity increases, right? If that's the case is would make sense that the .340 would benefit from such things.
Having said that my .340 throws a pretty big party at the muzzle when fired as is so I'd have to imagine a brake, while it might make a substantial difference in recoil, would be nigh intolerable. I just don't dig brakes. I've never shot a Mag Na ported anything (though my .500 S&W seems to have a similar top muzzle vent but still no rifle) so I was wondering what the blast was like compared to a brake?
Good Question.
I was doing a muzzle break review about 20 years ago when I sent a couple of rifles off for Magnaporting. When the .340 came back I noticed two things:
1. The advertising was correct and verifyable.
2. The muzzle stayed considerably straighter with minimal lift and the sensations of recoil was considerably reduced. As I owned both .338 and .338/378 Wildcat at that time, I was able to make direct comparisons before and after.
These comparisons lead me to unload the .338 because it offered no advantage over the ported .340, and also the .338/378 because I could not detect any difference whatsoever in the field, which also negated any justification for the heavier recoil, extra powder, more expensive cases and increased rifle weight of the .338/378.
If there is a point 3, there was no difference in chronographed loads before and after porting.
If there is a point 4, There was no perception of increased muzzle blast for the user which coaligns with the advertising.
John