Tried four loads with Mt Baldy 250gr GC cast boolit. Found a winner using 4831sc, Fed LR primers, sized x 3 WW brass, eyes from the first half of the last century
Rifle, well worn Winchester 71. Redfield receiver sight, King reflector front sight:
50yds:
100yds:
Chrono 2020fps.
I noticed when I shot jacketed bullets after the test the first shot was always high (6" or more), then the remainder of the shots returned to zero.
The other loads I tried gave groups twice that size.
Looks good enough to me.