Mine is a Charter Arms .44 Spl old model with exposed ejector rod revolver. I even have over size rubber grips on it and it still bangs my trigger finger big time.
So bad I dumped mine for a loss. Worst pistol I've had the misfortune to own. AMT made some real dogs!Most Uncomfortable - .380 AMT Backup ( SA)
Most recoil in absolute sense - Either .45-70 Contender, or John Ross revolver .
My Mossberg 590 Shockwave.
Fortunately, I've become something of a recoil junky, so the powerful backward jolt it delivers is nothing short of exhilarating to me, and believe it or not, it isn't painful at all because the grip angle doesn't send the recoil energy straight into your wrist like ordinary vertical pistol grips do.
The worst I have fired is a 4 inch 500 S&W magnum with 700 grain Underwood ammo.Brutal is an understatement!