I’ve got a neat one that my tool-and-die-maker father built from scratch in the 1960’s...It’s made out of tool steel, and can chamber pretty much anything you want… I have childhood memories of him filling it full of nuts and bolts or nails and shredding trees! I’ll snap a pic of it and post it.
Ty

I think he may have had the same lock building book I have.
Nice blunderbuss. This one is at the other end of the scale.
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