Back on Marlin Talk there was quite a bit of talk about various high pressure (40,000ish CUP) loads for the 45-70.
I may be wrong but it almost seems that many folks are rather casual about the amount of stress they subject their 1895s to.
In looking at one of the recent Hodgdon books I noticed something that might suggest caution in using some of the heavy loads.
The example was their own H4198 with a 350 jacketed bullet. They show 39,+++ CUPS with 54 grains, suitable for the Marlin, etc and then show just two grains more, 56 grains for 50,000 CUPs in the Ruger #1. That's roughly a 25% pressure jump for less than 4% increase in the charge. I know that 40,000 is often accepted by many as an acceptable pressure level in this gun and some even seem to think it okay to go a bit beyond. It is examples such as this one that make Marlin's (SAAMI) 28,000 CUP maximum seem more logical. Do what you like with yours - I'm just throwing it out as food for thought.
