Where does the 450 Marlin fit in with these calibers? Thanks
The 450 M. is essentially the same cartridge as the 45-70 but loaded to much higher pressure, which gets more velocity.
The case is designed so it will not chamber in a 45-70 to avoid damage to older low pressure firearm actions.
You can load the 45-70 to the same higher pressures in more modern guns that will handle the pressure safely, but have to be careful not to load the high pressure rounds/handloads in an older gun that will not survive the pressure.
Ted
