.38 special Stay away from the "+P" ammo
You need a good gunsmith.
Have it checked out by a good gunsmith.
use 32-20 ammo The caliber of the ammo is 32-20. It is not common although it is still available.
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The short answer is "no!". The cartridge may fire, but the case will split and the bullet will go somewhere downrange. Not pretty.
.45 Long Colt.
Colt (in both the 32 and 38) added "Colt New Police" to avoid advertising the S&W developments in 32 and 38 ammunition. The Police Positive Special will fire the old .32 S&W cartridge as well as the .32 S&WLong. You can also fire the old .32 Colt and Long Colt Cartridges (don't expect great accuracy). Why? Because these rounds use the same .312-313 bullet that are of the full case diameter, heeled variety like the modern .22 rimfires. Firing them in 32 S&W Long chambers will over expand the smaller cases ripping them apart. The .32 S&W and S&W Long cases are too large to fit in the older Long Colt chambers.
I don't think there is any +P ammo made for the 32 auto ????????
Needs to be checked out and verified by a gunsmith.
any 32 cal. revolver ammo.
No, and you shouldn't even use. 38 Special ammo in it, either. If it was made in the 1800s, it was probably chambered in .38 Long Colt, and that is the only ammo which is compatible with that revolver.