I do not understand why people insist on doing that with the 45-70 or any other caliber for that matter. It just does no make sense IMO. Why try to make it something it is not. With all the 45-70 rubbish lately on AR some might think I am anti 45-70. Nothing could be further from the truth. In fact I own more lever guns thanm any thing else. It's also possible to get 44 mag performance out of a 44-40. I never understood that one either. When I wanted a 44 magnum I just bought one.