Porting a Shotgun barrel
03-14-2011 | 09:46 PM
#4
Boone & Crockett
Joined: Feb 2003
Posts: 10,679
Likes: 0
You don't port a shotgun barrel to reduce recoil. It isn't going to happen. Barrel wall is too thin to offer enough surface area for the gases to push against and the pressures are too low to offer a significant decrease in recoil anyway (see below).
You port a shotgun barrel to reduce muzzle rise, allowing the shooter to acquire the second or third target quicker. The gases vent through the top of the barrel and push the muzzle down.
Although the noise levels are higher in a ported shotgun barrel it isn't like the sharp ear splitting crack of a braked rifle barrel. A shotgun is only operating at 10,000 - 11,000 psi where as a high power rifle is operating at 55,000 - 65,000 psi so the expelling gases are moving at a much lower velocity inside a shotgun barrel. Also by the time the gases reach the muzzle the pressure levels inside the barrel have dropped to just a couple thousand psi.
You port a shotgun barrel to reduce muzzle rise, allowing the shooter to acquire the second or third target quicker. The gases vent through the top of the barrel and push the muzzle down.
Although the noise levels are higher in a ported shotgun barrel it isn't like the sharp ear splitting crack of a braked rifle barrel. A shotgun is only operating at 10,000 - 11,000 psi where as a high power rifle is operating at 55,000 - 65,000 psi so the expelling gases are moving at a much lower velocity inside a shotgun barrel. Also by the time the gases reach the muzzle the pressure levels inside the barrel have dropped to just a couple thousand psi.
03-16-2011 | 10:08 AM
#5
Giant Nontypical
Joined: Dec 2007
Posts: 5,130
Likes: 0
From:
BB,
Pros of Porting
Porting results in a reduction of recoil and a reduction in muzzle climb. The recoil reduction comes from the fact that some of the hot gases that would normally help propel the shotgun backward against the shooter’s shoulder (recoil) are instead directed out of the port holes.
I sometimes see porting on the side of a barrel (in terms of the gases helping to reduse muzzle rise), so I had to research that further - check it out.............FYI
http://www.learnaboutguns.com/2008/0...hotgun-barrel/
http://magnaport.com/sgun.html
Pros of Porting
Porting results in a reduction of recoil and a reduction in muzzle climb. The recoil reduction comes from the fact that some of the hot gases that would normally help propel the shotgun backward against the shooter’s shoulder (recoil) are instead directed out of the port holes.
I sometimes see porting on the side of a barrel (in terms of the gases helping to reduse muzzle rise), so I had to research that further - check it out.............FYI
http://www.learnaboutguns.com/2008/0...hotgun-barrel/
http://magnaport.com/sgun.html
03-25-2011 | 01:07 PM
#6
Fork Horn
Joined: Aug 2010
Posts: 136
Likes: 0
From: Southeastern PA
I have hunted with a 210 (12 gauge) for years. I do not consider the recoil to be noticable. When you see that deer, your adrenalin is pumping and generally you only fire one shot. With the 20 gauge, even magnums cannot be worse than the 12.
Save your money and use it on a good scope or a trigger job. My trigger pull was 9 1/2 lbs! After you fire at your first deer, see if you remember the recoil.
Save your money and use it on a good scope or a trigger job. My trigger pull was 9 1/2 lbs! After you fire at your first deer, see if you remember the recoil.
