Hi HP Kid, Your revolver was probably still a BP one. Heat treating began later. But, if in good condition, your revolver may be fired using Winchester or Remington .32 S&W (check Midway USA). I have learned that these oldies are so prevalent that the cartridge manufacturers I mentioned have loaded their new made ammo to compare with the old BP specs. But heavy firing is, apparently a no no even if the weapon is in good condition. Pop off a few rounds now & again seems to be the rule, not daily use. Regards, Ray