I have an 1886 lever gun in .45/70. It was made in the 1890's and is good mechanically but pretty much a "grey gun" finish wise. I know technically these were designed for black powder but I guarantee it has been fed smokeless many times in the intervening years as were most of the period guns. Remington factory loads used to be 405 grain at 1300 fps, a mild load for the older rifles. Looked recently and the factory specs are 405 grain moved up to 1600 fps. Sellier and Bellot catalogue a 405 grain at around 1500 fps. Would these loads be too hard on the old 86 even though they are still mild compared to what you can handload the .45/70 to in a Ruger No.1?