Who hijacked this thread?
...but the 450 factory loads are far more powerful than any 45/70 load.
then the thread degraded into a 45/70 vs 450 Marlin bash.
Hodgdon reloading data shows that the 400 grain Speer FP bullet can be driven to a MV of 2023 fps by a maximum charge of 52.5 grains of H322 powder at a MAP of 41,900 psi.
Let's stick to answering his question.
It kicks a little more than a 20 ga. shotgun, but it is definitely easy to shoot.
It's funny but I always thought that velocity was based on case capacity and bullet weight, all things being equal. The "Hot" loads for the 45/70 like Buffalo, Garrett, Corbon do crank up the horse power. But if you use the same-same, powder and bullet weight you will have the same velocity
The ballistics are pretty much the same as the .45-70. The only differences are that the .450 is rimless, there aren't as many ammo options, and it will die out quicker than the .45-70.