I often saw bore damage in the port areas of a ported barrel... I feel this damage was due to the 'dust and debris' accumulating inside the ported every time the gun went in a out of a case... and when fired it was like miniature sandblasting in that area. Personally I never owned a ported barrel, for recoil reduction I preferred a brake.
Mag na port
- Thread starter canuck4570
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My hunting partner and I each bought new Browning Stainless A Bolt .338's when they first came out. These came with a 26" barrel, too awkward for the thick bush hunting we did for moose, elk and bear so we sent them to Magnaport in Manitoba and had them bobbed to 22" and Magnaported. Worked great. His got four port, I got six port. I lost about 160 fps with 210 gr bullets, no change to the excellent accuracy and significantly reduced muzzle jump. We were very satisfied, still are. The only downside that I could see was an increase in copper fouling in the last inch or two of the barrel starting at the porting. Solution? Don't let it build up, clean the rifle thoroughly.
guntech-
You have hit the NAIL on the HEAD twice in post 21 & post 23 in regards to Mag-na-Porting any Bbl.
Shoot the rifle enough & you have created a gas cutting,copper streaking mess.
A muzzle brake/weed burner is removable,easier to clean.
My time & funds go the KDF's.
Noisier...probably...but...I'm focused on the task at hand & do not hear the bang...just the bullet impact!!!
You have hit the NAIL on the HEAD twice in post 21 & post 23 in regards to Mag-na-Porting any Bbl.
Shoot the rifle enough & you have created a gas cutting,copper streaking mess.
A muzzle brake/weed burner is removable,easier to clean.
My time & funds go the KDF's.
Noisier...probably...but...I'm focused on the task at hand & do not hear the bang...just the bullet impact!!!
Why d'ya figure wire wouldn't work? Given the detail cuts I have seen it sure looks at least as smooth a cut as plunge, esp at today's tech for wire, vs. Thirty-plus years ago plunge EDM tech. Which is pretty much what that was.
I was kinda having visions of some guy trying to clean the carbon out of his custom "punisher skull" muzzle brake, with a piece of knotted dental floss though....
Yeah, guntech, I can see the indexing issue on a rifle barrel.
Why d'ya figure wire wouldn't work? Given the detail cuts I have seen it sure looks at least as smooth a cut as plunge, esp at today's tech for wire, vs. Thirty-plus years ago plunge EDM tech. Which is pretty much what that was.
I was kinda having visions of some guy trying to clean the carbon out of his custom "punisher skull" muzzle brake, with a piece of knotted dental floss though....
Yeah, guntech, I can see the indexing issue on a rifle barrel.
Wire EDM is used for profiling parts.
Plunge is the correct process.
And what is the inside contour of the port, if not a profile?
I've seen enough stuff done with wire to know it's a firm possibility, ranging from NDT Test pieces for calibrating Ultrasonic and Eddy Current rigs, through some very complex cuts in differing materials that were subsequently mixed and matched, forge welded together, and turned into some very high dollar Damascus steel blades.
Your procedure to wire EDM MagnaPorts would be?
How would you feed the wire into the barrel to cut the first,second,third,fourth,fifth,sixth port?
Drill a pilot hole for each cut?
How would you bend the wire while feeding it as not to cut/burn the bore?
A plasma cutter or water jet would work the same as a wire EDM in that operation....mirror image holes/ports on each side of the Bbl.
The above options work for profiling as per your NDT/ knife blade application.
(it's apparent that you have not set-up or operated any of the applications discussed here)
You want to explain that, because I think we may be looking at different things.
The Magnaport that I know of is a single port, not six of them, that looks more or less the shape of an eraser with one end on wrong, or a section cut off the wide side of a Triangle. And it IS a straight through port, intersecting the top of the barrel bore.
A pilot hole would work quite well.
BEND the wire? Dude, we are DEFINITELY talking about way different porting.
Run one? Nope. Spent a bunch of time dealing with guys that did though, and a fair bit of time shopping for one too at one point. I have a pretty decent idea what the capabilities are.
Given all the other capabilities that are out there, I would not at all be surprised to find someone supplying an offset wire guide that could be threaded through to work inside the barrel bore, though I would be really surprised if it worked in conjunction with the autothreading system.
I worked for Joe Undicks at magna-port when it was beside SIR on Burrows...I did sort-of apprentice gun-smithing as a part time job for the gentleman(stuggling to remember his name) that worked for Joe doing the side jobs but mostly I ran the EDM for porting. I have shotguns as well as a rifle ported in this manner that I did, and never have noticed copper fouling...though I shoot mostly cast from the rifle. I never did a six port rifled bore, just the four port on rifles, or two, on pistols/revolvers. I had no experience or machining knowledge but Joe set me up with specific training that was sufficient to port some very expensive shotguns, and lots of run of the mill rifles.
I'm disappointed to hear of difficulties with bore fouling, the ports I did were back-slanted 5 degrees or so to avoid a cutting edge at the front of the port.
I believe when i left Joe did all the porting himself, and even then (1989?) he was not in the best health.
Magna-porting was a kind of elegant solution but I think it was an process now far eclipsed by a decent brake for rifled bores....still nothing quite like the change in a shotgun with a lengthened forcing cone and porting though.
I'm disappointed to hear of difficulties with bore fouling, the ports I did were back-slanted 5 degrees or so to avoid a cutting edge at the front of the port.
I believe when i left Joe did all the porting himself, and even then (1989?) he was not in the best health.
Magna-porting was a kind of elegant solution but I think it was an process now far eclipsed by a decent brake for rifled bores....still nothing quite like the change in a shotgun with a lengthened forcing cone and porting though.
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That's a neat bit of history. Thanks for sharing.
On the shotgun side of things, the best change for 12 ga guns be proper overbored tubes of .775"(10 ga) with long forcing cones on both the chamber and leade into the choke. The work that Stan Baker did back in the day with his BB-84 barrels helped
lead the way to guns like the 835 Mossberg which are great performers with heavy goose & turkey loads and are stellar for clay busting.
To handle a barrel?
I phosphate plated a barrel, torqued it into the receiver and checked the headspace last week.
Hope it's warm on Monday as I will certainly leave the overhead doors open to make sure I hear the helicopters......
I'm just not that paranoid.
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Quote Originally Posted by guntech
... And get a federal gunsmithing license and make sure all the employees have a PAL ...
Not many guys can remove their factory barrel from a receiver and without the receiver how would you index the porting... so yah.. the machine shop and everyone that would have access would need to be licensed...
... And get a federal gunsmithing license and make sure all the employees have a PAL ...
Not many guys can remove their factory barrel from a receiver and without the receiver how would you index the porting... so yah.. the machine shop and everyone that would have access would need to be licensed...
