Silver soldering? Brazing?

Scorch

New member
The outer portion in the chamber/barrel hood area is a sleeve that's fitted over the inner portion of the chamber -- the actual chamber -- and then (from what I've read) silver soldered in place.
Not to be too picky, but this is almost right just not quite. The barrel is a tube that is shrink fitted into the casting that has the hood, locking lugs, and barrel lug. As the casting cools, it clamps down very hard on the exterior of the barrel, anchoring it. The chamber is cut into the barrel. This is a fairly common method for cheaply made barrel, and much cheaper to manufacture than the "correct" integral barrel and hood as in older Colts and WW2 1911s. We used to see a lot of barrels made this way being sold as "surplus" by Numrich back in the 1980s. Kimber still sells guns with barrels like this.
 

Jim Watson

New member
MC Ace makes adapters for 7.62×39 for either .308 or .30-06 chambers. There is a question on their site asking "how about .308 in .30-06", but no answer and no such product listed that I could spot

I spotted the part that says:
"Also available in 308/30-06. Each kit includes one tube of Locktite™. Complete kit: only $25.00. Broken shell extractors: $10.00"

This is a fairly common method for cheaply made barrel, and much cheaper to manufacture than the "correct" integral barrel

Probably cheaper, but it can also be stronger. I have seen more pictures of broken off link lugs than pulled out tube/chamber barrels.
FN makes BHPs with two piece barrels to get the "grain" to run right in the cam lug.
Also found in "monobloc" shotgun barrels from such builders as Beretta and Perazzi.


I guess the OP has given up on us, I was hoping for details of his "off-ball project."
 

F. Guffey

New member
A proud gun owner walked up to me at a gun shop; he wanted to know what happen to his rifle, his rifle started out as an Israeli converted Mauser. His 7.62 NATO became a 30/06 with a 30/06 artifact: meaning a 7.62/308W chamber can not be cleaned up with a 30/06 reamer. Ever case he fired had a ring around the case, the ring around the case was caused by the shoulder/case body juncture from the 7.62 NATO chamber. First I had to determine who talked him into going to 30/06 and I had to determine who did the reaming. Sure enough, it was an old friend.

To get rid of the ring/artifact he could go to a Gibbs or Ackley chamber or could replace the barrel, not easy to find but the 308W/7.62 NATO from the old days can be found among take off barrels.

F. Guffey
 

F. Guffey

New member
And then there were smiths and reloaders that got the cleaver ideal to convert 7mm57 to 280 Remington. Again, not a good ideal, because the 7mm57 has a generous neck meaning when finished the shooter/smith/reloader will have an artifact from the 7mm57 that causes the fired case to have two different diameter necks.

And then there was another 8mm barrel with the same problem.

F. Guffey
 

Jim Watson

New member
Was the "artifact" enough to make extraction hard?

I once read an article "A Conversion Failure" about an 8mm '06 rechamber that left a ring on the case.

A friend has a .280 that used to be a 7mm Mauser. But it got that way with a new barrel.
 

F. Guffey

New member
I once read an article "A Conversion Failure" about an 8mm '06 rechamber that left a ring on the case.
If that was possible I would have two of them. The difference in length from the shoulder to the case head between the 8mm57 and 30/06 is .127". It is possible to have a Mauser chamber with a generous neck, if that happens we are beck to having two different neck diameters.

I have fired 8mm57 ammo in a 8mm06 chamber:eek:; if there was any truth to the old but cute saying the firing pin drives the case forward to the shoulder of the chamber my cases would have separated because we all should know the case can not be stretched .127" between the case head and case body. But we still have reloaders that insist everything gets into a race for the front of the chamber when the trigger is pulled. I could have an exception because I have killer firing pins and I use factors like time and distance.

F. Guffey
 
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Jim,

I saw that at the bottom of their page, too, but when I looked at the context of the whole page, I concluded it was referring to 7.62×39 adapters. Just bad page layout because of the words "or the .308 in the 30-06?" but then goes on to describe the 7.62×39 adapter, only.
 

Jim Watson

New member
Yeah, you would have to be pretty curious to find out just what they are selling.

And we still don't know what the OP wants to convert.
 

F. Guffey

New member
The outer portion in the chamber/barrel hood area is a sleeve that's fitted over the inner portion of the chamber -- the actual chamber -- and then (from what I've read) silver soldered in place.

Same thing only different: Drill out a 45 ACP barrel and save the lugs and hood, then purchases a barrel blank, the length does not matter this method works on 38 Super. This has been done on pistols with extended frames and slides. Turn the outside of the barrel blank to fit the sleeve then chamber. Most weld, I suggested threading both pieces, some of these pistols shot as good as rifles at 100 yards.

http://silfos.com/htmdocs/product_support/how_to_info.html

F. Guffey
 

Jim Watson

New member
This was one approach used by Clark to build .38 Special wadcutter guns back when gunsmiths had to make stuff instead of ordering it.
I don't know how he retained the tube in the monoblock, though.
 
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