BrocLuno
Member
Silver solder is good for something in excess of 20K psi and the long surface between the joining rib and the barrels makes for a joint you could not likely pull apart with two pick-up trucks. Even the biggest doubles in the cordite/nitro express calibers do not shoot their barrels apart. I think some are brazed too (?) and that would make for an even stronger joint
As for box locks not being strong, well let's see - shot guns and double rifles down to 6 bore (about an inch if I recall) seem to take the abuse just fine and have been doing so for over a century, so I guess it's not an issue of strength? As long as the chamber will hold the radial pressure, I'm sure the receiver will hold the linear thrust and back pressure. I think they have more locking surface than a couple of small bolt lugs fitting into a receiver ring that is only an 1/8th of an inch thick or so around the bolt lug channel? Ruger #1 is a modified box lock and they are chambered up to 458 Lott which is bigger and nastier than anything I would ever put up to my shoulder
Bottom line, I don't know about blowing up a box lock double? Not knocking your range friend, but I don't think those issues are really a big concern? I think it's more like cost and availability of gunsmiths who can actually do this work?
Jim. I understand your thoughts and that's why I have not pursued it. I am thinking about building a break action single shot on a CBC shotgun action as I love their under lever action. That should be relatively straight forward. Cylinder bore the barrel and insert a liner with chamber. I was thinking about a .22 Hornet into a 20GA That would be a first step. If it went well, I might try the same with a SxS
As for box locks not being strong, well let's see - shot guns and double rifles down to 6 bore (about an inch if I recall) seem to take the abuse just fine and have been doing so for over a century, so I guess it's not an issue of strength? As long as the chamber will hold the radial pressure, I'm sure the receiver will hold the linear thrust and back pressure. I think they have more locking surface than a couple of small bolt lugs fitting into a receiver ring that is only an 1/8th of an inch thick or so around the bolt lug channel? Ruger #1 is a modified box lock and they are chambered up to 458 Lott which is bigger and nastier than anything I would ever put up to my shoulder
Bottom line, I don't know about blowing up a box lock double? Not knocking your range friend, but I don't think those issues are really a big concern? I think it's more like cost and availability of gunsmiths who can actually do this work?
Jim. I understand your thoughts and that's why I have not pursued it. I am thinking about building a break action single shot on a CBC shotgun action as I love their under lever action. That should be relatively straight forward. Cylinder bore the barrel and insert a liner with chamber. I was thinking about a .22 Hornet into a 20GA That would be a first step. If it went well, I might try the same with a SxS
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