This was posted as a max load in Lyman’s 45 manual. We have fired a few of these in my buddies original 1884 trapdoor Springfield and my H&R repro officers model. No I’ll effects but modern manuals don’t go that high. I see that even the 42nd edition used 14 grains. Current Alliant data lists 11 grains.
Any others doing this? I can certainly download. Unique is certainly economical in these times.