I note the ME of the standard loading of the 405 grain .45-70 is only 1570 Ft-Lps. I find it hard to fathom that not being considered an adequate load for a deer. I also recall some years back a Deer head being bought at a yard sale which turned out to be a new Record. It was eventually awarded to an older gentleman who had claimed it (awarded post-humeously) who had shot it in the early 1900's with either a .32-20 or .25-20 (I saw conflicting reports on this), neither of which we consider today to be totally adequate deer calibers.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra