Rimfire ID needed


#1

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.


#2

Twigbender, you called those. Measured several of mine and yours are close. Dimensions of rimfires vary so much at that time it is a wonder some fit the chambers. Without SAAMI guess gun makers made the largest chambers they thought any cartridge of a certain design would fit and hoped an undersized one would not rupture. The Spencer would be a 56-52. Some makes of the 56-52 had soulders which was actually a bullet crimp the shoulders depending on make are all over the length of the case a few were roll crimped.
Gourd


#3

In my opinion the one on the left is a Norwegian 12 x 44 R Remington m/71. All its dimensions match and the bullet shows the typical knurled cannelure.


#4

I agree with Fede the first one looks like a “50 Norwegian” Remington.

Paul


#5

Thank you, guys. Now that you mention the “50 Norwegian Remington” I recall someone back in the early 80s telling me that’s what he thought it was. I haven’t been able to find that cartridge in any of my lists, so I assumed that he was just blowing some smoke. Maybe he was on to something!
Thanks again!