It is a common misconception that "porting is for competition shooting."
In fact, porting is not useful for competition, and only OPEN division in USPSA allows Compensators, which actually significantly reduce muzzle flip. IDPA prohibits ALL porting and compensators.
Unless you have a high-pressure cartridge, porting effects are minimal, but, boy, is it a raging fad now!!
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Science plus Art
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