When is a firearm not a firearm but a Object De Art is the not shooting it.
The only reason for not shooting is if its unsafe to do so (like explode in your hands) or had ammo made of unobtanium.
I doubt Id own a sharps .52 cal rimfire.
Because I couldnt find ammo.
If I did have one for some reason Id be looking into special conversion cartridge that uses a rimfire blank cartridge as a primer.
Many years ago I bought a box of parts that was reputed to be a Winchester 30/30 and after many years (pre-internet) I managed to fix what was a very rough looking winchester model 64 (pistol grip version of a win 94) that was the only 30/30 that grouped so tight it was boreing to shoot.
I sold it to a guy from Chicago.
Many years later remembering my foolish sale of that sweet shooting winchester, I bought a (1970's) marlin 336a with the same configuration (pistol grip and half mag) though it looked the same it was not.
It didnt "feel good in my hands" and accuracy was no where near what that thrashed out looking model 64 did.
I learned through remorse if you have a good shooter hang onto it like grim death to a sick dog.
I have a thrashed looking mosin that wont win any originality contest, but that old revived tomato stake mosin shoots neck n neck with my Savage 110.