Welding on a barrel

drill702

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I have just acquired a barrel for my 870 and somebody bubba'd down the barrel band so the end cap would screw on more . Well they cut in to the barrel a little bit, can I just run a tig bead on it ? It's a dominion arms barrel. I've already shot it before I even noticed but would like to fix it for peace of mind.
 
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Problem with tig (and any welding) it changes the composition of the metal, and also any heat treating that was in the barrel. Now being half way down the barrel you may be ok. But any barrel i see in the store that is welded post manufacture generaly gets tossed in the scrap bin.
 
From Wiki: According to Remington, modern powder in a shotgun burns completely in 25 (9.8425 in) to 36 (14.173 in) cm barrels.

So pressure shouldn't be a problem. Now it becomes a question of cosmetics, rusting of the heat affected zone, burn through and distortion. Safety shouldn't be an issue but be sure to tell the buyer if you sell it.

Probably boils down to your skill as welder and your choice of filler rod.
 
This is going to go against the grain of some folks but we aren't talking about an expensive firearm here. It is a low value firearm that actually gives a pretty good bang for the buck.

The welding of the spot will change things but mostly on an inconsequential level.

Before you fill in the cut remove the barrel from the receiver/stock and stuff it full with loosely packed but completely water soaked rags. These will absorb the heat which will only be applied for a very short time period. The water soaked rags will draw the heat away from the steel and not allow it to heat up enough to change anything that will effect its safe operation. This is of course IMHO.
 
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