Can Anyone I.D. This?

[will.s]

Found it in a box of odd-ball rounds that were handed down to me. Figured out what everything else is but can't i.d. this one, anyone have any idea what it is?

 

[tiriaq]

Remington-UMC made .41 Swiss rimfire.

 

[Janeau]

What is the caliber ? Measure at the junction bullet -case.
There is about 50 kinds of rimfire rounds...maybe more.

 

[Snider shooter]

41 Swiss, 0.430 bullet. I have a few rounds and rifles. A couple changed to center fire.

 

[will.s]

Cool, thanks guys!