44 Long?

I have what I thought was a 44 Long rimfire but now I’m not sure so I hope someone can ID this for me
Rim .500
Head .435
C.L. 1.00
Bullet Dia. .434
Case mouth .439
OAL 1.525
The head has a depression of .335 with a raised dimple in the center with 2 tic marks on the center line.
The bullet is pointed with 1 groove about .100 up from the case mouth.
Thank You Carolyn

Carolyn, Is the case copper ? I have a brass cased .442 carbine round that is very close to the specs. you show. M. Rea

The case is copper