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Old September 22, 2012, 10:20 AM   #2
Senior Member
Join Date: February 28, 2008
Location: Michigan
Posts: 2,313
Some people say it's good and some say it does nothing. I lean to the nothing people.

Shotguns operate at much lower pressures(12,000psi) than a rifle(50,000psi), and venting off some of the powder gas won't do much help in controling recoil.

In rifles part of the recoil impulse is from the jet/rocket effect from the gas comming from the muzzle, and a brake will help control recoil. Shotguns the recoil impulse is more form the fact you are shooting a 492 grain hunk of lead out the barrel.

The porting makes the gun sound louder (venting gas closer to shooter) and some think the ports/holes look cool.
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