Do not get me wrong from my earlier post. The 45/70 is a great cartridge especially when loaded to other then trap door Springfield pressures. However it does not have the case capisity to equal the big British thumpers like the 450
Nitro or the .450 # 2 NE or even the .458 Winchester unless it is loaded to much higher pressures. It is not that the 45/70 is a bad cartridge it is just that every thing has its limitations and a dangerous game cartridge the 45/70 is not.