I need some help Id-ing these two cartridges.
On the left: No headstamp. Dimensions are: bullet dia: .487; rim: .633; base: .550; neck: .532; case lgth: 1.735; aol: 2.24
On the right: “U” h/s; bullet: .523; rim: .644; base: .560; neck: .527; case lgth: .963; aol: 1.77
My guess is that the left is a .50 US Carbine, and the right is a Spencer. But I wouldn’t hang my hat on either one.
Any ideas? Thank you.