inherited my grandmother's 1903 Colt hammerless. I asked my husband to pick me up some 32 ammo, but forgot to mention the acp detail. He bought me 32 Remington UMC, center fire, fmj. Does it matter that they aren't marked "ACP"? Is this just a stupid question? Still like to know, though. My granny used it to chase vagrants off her property. Her pit bull probably helped.