The round not the gun. I've always wondered why the semi-rimmed .32 ACP had a rim in the first place since it headspaces on the case mouth anyway. Then thought that John Moses had tooling to cut it larger then the case already in place so why bother when in the beginning of the 1900's the thought of a pistol HP was unheard of. Then the discussion came up on another forum altogether about .32 vs .380 that the rim was there so it would chamber in the popular .32 Colt and S&W revolvers of that time and it actually can. I would have a problem with the higher pressured acp round in that top break S&W revolver though. I figured I would pole the .32 crowd for thoughts on the matter.