Some brass I don't know

[don3]

I got 13 pieces of brass in a deal I can't figure out' It is hand made, no headstamp, turned from brass stock. OAL is 1.145/1.150, Rim is .645 and .060 thick. is 50 cal., in side mouth is .505/.510. It looks alot like 50 Remington but not quite the same size. Any one know what it is?

 

[amandab]

12.5mm rimmed russian smoothbore revolver.

Maybe.