In reply to:

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Here are some thoughts from one who has built 3 and is on # 4. Regular tin/lead solder will do fine but, as Tony pointed out, Force 44 tin/cadmium solder from Brownells is far superior. It has a tensile strength of about 28.000 psi versus 4-5000 psi for tin /lead solder.

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In reply to:

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There have been hundreds of thousands of guns built on the monobloc system, using nothing but tin/lead solder. All that the solder does is to hold the barrels into the mono-bloc, it contributes zero to the ability of the assembly to retain and withstand pressure.

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Ron,
In the above statements you say that tin/lead solders are fine and you then say that tin/lead solder has a tensile strength of only 4-5000 lbs.

In you most recent post you are now saying that you use Force 44 with 28000 lbs.

Make your mind up please.

Flaunting my ignorance eh.
Ok, the gloves are off!
I'll say right now that I think that anyone who thinks that

>>>>All that the solder does is to hold the barrels into the mono-bloc, it contributes zero to the ability of the assembly to retain and withstand pressure<<<<

and anyone who would claim that 4-5000lb strength tin/lead soft solder is ok to use to attach the barrels to the monoblok of a double rifle,

is, well, not really worth having a debate with.

hmmm ......tactfull Alan very tactfull.

Ron, if you want to impress me, try answering the questions in my last post.
Start with supplying the makers names who build hundreds of thousands of guns with nothing more than tin/lead soft solder joining the barrels into the monoblok.