I have been shooting a Marlin 45-70 and 400 grain bullets over a case full of H322 for over 25 years. I don't go over what the book says. I read the Marlin 1895 had to have metal removed to accommodate the 45-70 rim, so it is a weaker action then other Marlins. Makes sense to me. Following modern 45-70 load data gives one a load that is powerful enough for big bears and other big critters. It is a .458 bullet coming from a smaller case then a .458 Winchester, which makes it a shorter range cartridge for killing big stuff.
I can't imagine a well constructed 280 to 300 grain .444 bullet not taking care of any thing in North America.
