Hi All,
Respectful disagreement if I may. I'd say do it...though...scope mounting position is certainly a consideration. I suspect that if you mount your scope on the frame and not on some cantilever mount or close to the ports, you may have a problem. Also, I have a unscoped predator and it's front sight is always blackened after a few rounds.
I've had Mag-Na-Port predators and stalkers. I've also had a number of rifles done...all .300win and greater. I like it and have it done on 44s and the like. I do feel some (though not great) recoil reduction and significant reduction in muzzle rise. I think this is important, so, I do it.
Please solicit other opinions, or better yet, try to find someone at your gun club that has one done and try it.