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Old August 6, 2012, 02:28 PM   #8
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Join Date: December 4, 1999
Location: WA, the ever blue state
Posts: 4,678
Goatwhiskers Clark, if I understand you correctly, you're shooting a .45 cal bullet down a
.41 cal bore in a gun with a cast iron frame, not steel. Not only that but the lug is soldered on, not welded. Your business, but I'd do some serious thinking about that. Goat
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It looks like the Solder joint is .5" x 2.55" = 1.275 sq in

Silver solder joints are good in shear for somewhere between 17.5 ksi and 35 ksi.
That would make the joint good for somewhere between 22,312 pounds and 44,625 pounds of force.
The inside diameter of 45 LC brass is ~ .45" = .159 sq in.

The max chamber pressure for that Solder would then be between 140,000 psi and 280,000 psi.

In that .410 I have shot :
405 gr .458 lead .981", 40 gr H110 2.75"

That is essentially a 454 Casull double load with longer OAL to get the powder to fit.

Do I need to go through the hoop stress on the .26" thick chamber walls or the section modulus for the L shaped receiver, or the double shear on the hinge pin, or the lug...?

It is enough like a Handi Rifle that I have already done a stress analysis, so I just did it.
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