The only difference in the two rifles (.450, .45-70) is the threads, v-shaped vs square.
The most popular picture of an 1895 kaboom was done because the wrong powder was used. That much of that type of powder would have blown anything up.
I would have no problems whatsoever with a steady diet of loads in an 1895 running at 38.5 Kpsi, but I have found that to get more than enough performance only requires 35 K.
