i have a #3 in 45/70. it's very accurate to probably 150 yards. i only have reciever sights on it .
with federal 300s it's not TOOOOO bad in the recoil department for a 6 lb rifle.
catnthehat was good enough to stick a decellerator recoil pad on it and it tamed it a lot. but it's not the gun for extended range sessions. ouch!
i had a marlin in 45/70 that was much easier on me, but was silly enough to sell it.
45/70's very easy to reload, shoots cast or jacketed. i was always interested in the 444 tho.
i can't see the point of the 450 but then that's me. they are all big thumpers, capable of taking anything on this continent.
also small game if you use a bit of unique and a 457 round ball.
heck , i even have shot loads for mine using card wads.
could the 45/70 be the fabled "all round cartridge"??
naaaah! i don't think so.
that'd be the 45/110 that i have in a sharps replica ... better case capacity for shot loads.