I have guns with both brakes and mag-na-porting. Muzzle brakes will reduce more recoil then porting. They have a tendency to direct the gases back towards the shooter resulting in a louder report. Porting has the advantage of not loosing any barrel length. This helps with velocity.
If I am looking for all the velocity I can get out of a long range pistol, I go with porting. If I am looking for maximum reduction in recoil, I go with a brake.
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