In 1940, my father bought a new Winchester 94 carbine in .32 Winchester Special. He gave it to my uncle, before going off to World War II. My uncle was unable to serve because of bad eyesight.
My uncle planned to have two boys. He had two girls, instead. That .32 languished in my uncle's closet until 1971, when I was 16, and he gave it to me.
I still have it.
It's had some minor wear since, but still shoots true.
The first round I ever reloaded was for that .32 Winchester Special, with a Lee Loader, about 1972.
At last count, I reload for 22 rifle and handgun calibers.
Through the years, I've learned a few things about the .32 Winchester Special:
IMR3031 is probably the best powder for the jacketed, 170 gr. bullet. It duplicates the factory, or nudges the bullet a wee bit faster with judicious, carefully crafted handloads.
Factory .32 WS cases are usually slightly too long. Size them, then trim to 2.030 inch.
.32 WS dies can be used to reload .32 Remington ammo. I did so years ago, for a friend who had an old Remington auto rifle. They worked fine. Empty .32 Remington cases are rare. You'll have to buy a different shellholder to fit .32 Remngton cases, they're rimless.
The .32 WS can be very accurate with cast lead bullets of .321 or .322 inch. A moderate load of Unique powder makes a good plinking and small game load.
The 8mm Nambu pistol cartridge uses full metal jacketed bullets of about 100 grains. I've never experimented with this bullet, but it seems like it would make a good rabbit or squirrel load.
Gad Custom Cartridges sells 8mm Nambu bullets. An internet search may also reveal cast lead bullets for the 8mm Nambu.
The 8mm Nambu bullets are pointed, so it's probably best to use them singly in the chamber and not load more than one in the magazine tube. However, a light load would probably lack enough recoil to set off the primer of the cartridge ahead of it. You'll have to decide for your own on that matter.
The .32 WS is reportedly better-suited to using black powder than the .30-30, owing to the .32's rifling pitch of 1 turn in 16 inches, compared to the .30-30's of 1:12. The slower pitch shrugs off black powder fouling more readily, or so I hear.
If you use black powder, you'll need to use a very soft lead bullet with SPG or Lyman Black Gold bullet lubricant. Black powder doesn't work well with hard-cast bullets employing lubricants designed for smokeless powder.
Speer and Hornady both make 170 gr. jacketed softpoints for the .32 WS, for deer hunting. I have no preference.
The .32 WS is straightforward to reload. Use only a trace of lubricant on the case to resize it, or you'll get oil dents from lubricant being trapped around the neck during sizing. However, small dents won't hurt anything. They'll get ironed out when you fire the case.
The .32 WS is a fun round. Few shooters today have ever heard of it, let alone seen one. I don't believe that it offers any more power than the .30-30, but it certainly prompts more comments.
Decades ago, it was common to argue the merits of either the .30-30 or .32 WS -- rather like the 9mm vs. the .45 argument -- but you rarely hear the .32 mentioned today.
Have fun with that rifle. There's nothing wrong with the caliber, and much to recommend it.