If your fingers are round like beef sausages or you are wearing gloves, this will be an issue. I understand that the design is a faithful reproduction and many of the guys I shoot with have chubbier fingers than me, and they seem to not have too much trouble.
When you #### the hammer back, the revolver is ready to fire and the triggers are pretty light. If you have very large fingers, making room for your finger by cocking the hammer is dangerous advice.