Shooting them?

[Kensal Rise]

I hesitate to point this out, but a Manson Wall Thickness gauge is $110 at Brownells (about the price of a flat of cartridges). It comes with instructions. Anyone who seriously collects old double guns ought to have one of their own. And use it.

https://www.brownells.com/gunsmith-t...prod20463.aspx

[OH Osthaus]

Originally Posted by John Campbell

I hesitate to point this out, but a Manson Wall Thickness gauge is $110 at Brownells (about the price of a flat of cartridges). It comes with instructions. Anyone who seriously collects old double guns out to have one of their own. And use it.

https://www.brownells.com/gunsmith-t...prod20463.aspx

a simple and inexpensive tool kit (that will more than pay for itself the first time it saves you from a bad purchase)

the wood case came out of a antique/junk shop for a couple dollars and took a couple hours to refit - closed its roughly 7 x 24 inches so it doesn't take up much room in the truck

[78CJ]

Originally Posted by John Campbell

I hesitate to point this out, but a Manson Wall Thickness gauge is $110 at Brownells (about the price of a flat of cartridges). It comes with instructions. Anyone who seriously collects old double guns ought to have one of their own. And use it.

https://www.brownells.com/gunsmith-t...prod20463.aspx

I just looked at that yesterday, they were recently out of stock. I'll probably pick one up because I enjoy learning and finding things out for myself. I could couple my measurements with a hands on visual inspection by someone familiar with Damascus.