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Not handguns, but I have a 1895 SS .45-70 and a 77 .458 that were shot with exactly the same ammo before and after porting. Recoil, no change. But, they eleminated 95% of the muzzle jump. Before you had to hold the gun down on the rest when you shot or the barrel would jump up 6-12 inches. Since porting, they just lay there. Howwww sweeet it isssss!
