Cannot comment on the 45.70 but one of the guys at camp got one in .44 mag that he uses for deer. He loads the 240's up to about 1800 FPS with H110 and it seems to work well.
I shot it a couple of times and it functioned flawlessly. Accuracy was about 3 inches at 100 yards, plenty good for deer. OK rifle, fit and finish was good but it seemed kinda gaudy to me.
