Thanks Mike & 9.3x57, I wasn't questioning your intent.

As to fight - I cannot see why there even was one. The facts speak for themselves.
Now, if you don't handload and don't want to, factory ammo is avialable which brings the .45/70 up to date as Mike's loads show.
CorBon is only one of these new manufacturers of higher power .45/70's. I'd call them to find out about their pressure data on the loads they offer.