My standard action job involves polishing all the contact points that create friction in the action. Rebound slide, trigger, hammer and cylinder stop surfaces, etc. Choosing the right rebound spring is crucial to the press as well as the return. There’s no free lunch, it’s a give and take. The mainspring gets swapped out depending on the use case of the revolver and its age. Frame mounted firing pins on the newer guns allow for lighter springs but must have an extended firing pin…again, no free lunch.