Most of the modern load manuals designed for smokless powders have three specific levels of load data for the .45-70. High pressure like the Ruger #1, medium for the marlin lever gun and then some light loads for the trapdoor. I have not looked for smokeless .45-90 loads.
I have found the best part of pounding my head against a wall is that it feels really good when I stop.
However, banging your head against the wall burns 150 calories per hour.