The cartridge case is the same for 32 S&W Long and 32 Colt New Police. You can interchange ammo, but Colt New Police ammo has a heavier flat nosed bullet. When I load 32 S&W Long that is what I use for plinking and small game hunting. 117 grain Flat Point bullet sized .314" (same bullet I use in 32-20!) For target ammo I use a full wadcutter or semi-wadcutter 90 grain bullet also sized .314".

Ivan