I suppose it’s possible that the firing pin was replaced, Or full hammer. Check protrusion by opening cylinder and pushing hammer forward while trigger is pulled. Compare that to your other pistol. Also check your mainspring under the grips as people often fool with that. Make sure screw is tight and nothing has been inserted between spring and frame.
That’s about all you can do without help from a smith.

Last edited by Fury01; 12/29/22.