I'm confused about ammo for this rifle. This one ser. num. puts it at 1890, black powder, sporting style rifle. Stamped 32wcf. Warnings not to shoot smokeless in many articles are noted, pistol rounds probably okay. Checked Old Western ammuntion and they show loads with a 170-180 grain cast lead bullet. In a 32-20 case??? Must be traveling at 200 fps??? Comments please.