Whatever you do, don't fire smokeless rounds in it, it will come apart. I used to have an old Smith & Wesson No.2 Army form 1868 that fired .32 rimfire.
I made the gun dealer test fire it with .32 rimfire shorts (it worked fine). They sold it as a shooter thinking that I couldn't find .32 rimfire rounds (idiots). It's actually chambered for .32 rimrire "longs" (black powder, of course). I have 10 rounds of .32 rimfire "longs" and about 100 .32 rimfire "shorts". I was thinking of having a friend re-load them with black powder, so I could fire the short rounds, while keeping the longs.
In any event, an antique gun that can be proven to fire is worth more than a mere relic. I kept the 4 spent .32 rimfire "short" casings.