Seems like this is a popular 45-70 load with a 405gr cast bullet. I’ll go ahead and load 20 rounds and see how they shoot in my Marlin 1985 topped with a Redfield 2x7 scope.
My go to load with this bullet is 42gr of 3031
Sized to .460" it cut holes at 50 yards. I need to try 100.
I will with this load and the 3031 next time out.