The rifle is a Winchester 94, 26" octagon, 30-30, made in 1967, scope is an old Weaver K 2.5 with water in the eye piece right next to where I needed clear glass.
Boolit is Lee's 312185 cast from range lead, sized .311, gas checked, Alox lubed. Charge was 14 gr of 2400.
Temp was freezing in the 60's, wind was too much and too variable, eyes couldn't see the crosshairs and target very well.
Shot 1 was off the paper, 2 was barely on, adj the scope and shot 3 and 4 with the crescent butt on the shoulder. Ouch. Re adj the scope and shot a five shot group with the butt on the arm just outboard of the shoulder.
Crescent butt plates are made to shoot off the arm and it works, so does the 312185.