« previous next »
Pages: [1]   Go Down

Author Topic: Porting a barrel  (Read 592 times)

0 Members and 1 Guest are viewing this topic.

Offline Joshua

  • Trade Count: (0)
  • Member
  • *
  • Posts: 28
Porting a barrel
« on: October 21, 2009, 05:18:13 AM »
Can I do it myself? If so how do I go about it? Will it change the preformance of the gun? 
Logged

Offline Reverend Recoil

  • Trade Count: (0)
  • Contributor
  • ***
  • Posts: 253
  • Gender: Male
Re: Porting a barrel
« Reply #1 on: October 21, 2009, 07:22:58 AM »
You did not indicated what kind of gun you are considering porting.  Porting a shotgun barrel has little to no effect on recoil.  The mass of the gunpowder(which is also the mass of the expanding gas) is very small compared to the mass of the wad and shot.  Ports will increase the muzzle noise for the shooter and bystanders and are fouled by plasitic from the wads.  Ported screw in chokes have even less effect on recoil.  Barrel ports are most effective in reducing recoil for rifles that are chambered for cartridges that have high powder capacity and a relitively small bore.  Ex; the same barrel ports or muzzle brake would be more effective on a 270 Win than a 45-70.  I hope this helps.
Logged

Offline Joshua

  • Trade Count: (0)
  • Member
  • *
  • Posts: 28
Re: Porting a barrel
« Reply #2 on: October 21, 2009, 08:20:17 AM »
I was going to por ta slug gun. Thanks for the info.
Logged

Offline gunnut69

  • Moderators
  • Trade Count: (0)
  • Senior Member
  • *****
  • Posts: 5005
Re: Porting a barrel
« Reply #3 on: October 21, 2009, 02:00:58 PM »
Shotguns are not hugely affected by ports but they do have an effect. The drabacks are correct although the noise is worse for the bystander than the shooter.. This is something an advanced ameture can do with a bit of caution. Porting jigs used to be common and with the correct size dril they are fairly simple. Deburring is a must and the prots still collect gunk but most will shed it when the next shot is fired and the high pressure gasses come blsting thru. I hate prots of any kind but many competition shooters swear by them.
Logged
gunnut69--
The 2nd amendment to the constitution of the United States of America-
"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Offline Thebear_78

  • Trade Count: (1)
  • Senior Member
  • *****
  • Posts: 1006
Re: Porting a barrel
« Reply #4 on: October 21, 2009, 05:27:34 PM »
I have seen a lot of botched home done porting jobs.   If you really need it done have ti done by a professional.
Logged

Offline 45-70.gov

  • GBO Supporter
  • Trade Count: (7)
  • Senior Member
  • *****
  • Posts: 7009
  • Gender: Male
Re: Porting a barrel
« Reply #5 on: October 21, 2009, 05:41:56 PM »
competition  shooters  use  them
competition shooters  always  wear  eye  and ear  protection
I  HATE  PORTS
i  wear  eye  but  no  ear protection  when hunting
in  self defence  probly  neither......get  the bad guy  but  loose  an  eye

I  HATE  PORTS
I  HATE  PORTS
I  HATE  PORTS

ADD  WEIGHT  OR GET  A LESS POWERFUL GUN
OR  JUST  LEARN TO SHOOT  IT LIKE IT  IS
I  HATE  PORTS
Logged
when drugs are outlawed only out laws will have drugs
DO WHAT EVER IT TAKES TO STOP A DEMOCRAT
OBAMACARE....the biggest tax hike in the  history of mankind
free choice and equality  can't co-exist
AFTER THE LIBYAN COVER-UP... remind any  democrat voters ''they sat and  watched them die''...they  told help to ''stand down''

many statements made here are fiction and are for entertainment purposes only and are in no way to be construed as a description of actual events.
no one is encouraged to do anything dangerous or break any laws.

Offline Joshua

  • Trade Count: (0)
  • Member
  • *
  • Posts: 28
Re: Porting a barrel
« Reply #6 on: October 22, 2009, 03:45:05 AM »
Quote from: 45-70.gov on October 21, 2009, 05:41:56 PM
ADD  WEIGHT  OR GET  A LESS POWERFUL GUN
OR  JUST  LEARN TO SHOOT  IT LIKE IT  IS
I  HATE  PORTS

It was for my son. I have one that is 9 that will shot it. He is big for his age. Then a small framed 11 year old that dosen't like the kick. I guess I will find him a 20 ga.
Logged

Offline gunnut69

  • Moderators
  • Trade Count: (0)
  • Senior Member
  • *****
  • Posts: 5005
Re: Porting a barrel
« Reply #7 on: October 22, 2009, 09:39:30 AM »
There precious little lost when shooting a modern slug from a 20 ga.. The problem with porting is that it doesn't adequately address the rearward motion. The barrel is much too thin to provide much direction to the gasses and a shotshell produces little gas.. Adding weight will make the gun harder for a kid to handle, sorta defeating the purpose.. If leagal in you state a rifle may be a better idea.. Single shots such as the NEF guns and many others (mostly imported) are available and the calibers such as a 223 or 243 would be great for a youngster.. 45-70.gov--- I too hate brakes but have used them when needed.. With ear and eye protection (only the best...) they can be safely used.. I hesitate to reccomend one for a child as I've read that the deleterious effect on kids is worse than adults.. I started my kids off with sound silencers, mini sonic valves when hunting and at the range. they no long use the ear protection but shot well. They started with a 243 winchester amd 100 grain Nosler partitions.. worked quite well thanks.. The Daughter took a 130 inch class buck her second season and many other deer since.. Last sunday nite she walked the 'White Coat' ceremony at the vet school here in Missouri,, a couple more years and she'll be through.. Sorry but I just had to brag a bit!!!
Logged
gunnut69--
The 2nd amendment to the constitution of the United States of America-
"A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed."

Offline 1marty

  • Trade Count: (0)
  • A Real Regular
  • ****
  • Posts: 751
Re: Porting a barrel
« Reply #8 on: October 22, 2009, 04:19:00 PM »
Joshua, the 20 gauge at times will have the same recoil as a 12. The 20 is a much lighter gun and the "recoil" is about the same. I ported an over under awhile back and it had absolutely no effect on recoil or barrel jump. Usually, the rule is the heavier the gun the less the recoil. Or use lighter loads. First time shooters tend not to hold the shotgun tight and usually they go home bruised.
Logged

Offline 45-70.gov

  • GBO Supporter
  • Trade Count: (7)
  • Senior Member
  • *****
  • Posts: 7009
  • Gender: Male
Re: Porting a barrel
« Reply #9 on: October 22, 2009, 05:20:33 PM »
recoil  pad
heavy  jacket
light  loads
then  work   up  to heavy loads

a  little  time  and practice.....
.don't  baby them  or push  then  too  hard or dought  they  will  adapt

Logged
when drugs are outlawed only out laws will have drugs
DO WHAT EVER IT TAKES TO STOP A DEMOCRAT
OBAMACARE....the biggest tax hike in the  history of mankind
free choice and equality  can't co-exist
AFTER THE LIBYAN COVER-UP... remind any  democrat voters ''they sat and  watched them die''...they  told help to ''stand down''

many statements made here are fiction and are for entertainment purposes only and are in no way to be construed as a description of actual events.
no one is encouraged to do anything dangerous or break any laws.
Pages: [1]   Go Up
« previous next »