Back in my GI Bill college days in 1969, I bought a .303 Ross rifle M1910 from a fellow student for $15.00. I shot the Ross and found it shot .303 Ball a foot high at 100 yards with the battle sight. I cleaned the Ross and greased the bore.
Today, I got the old Ross out of the vault and tried my Mark III Enfield (dated 1911) cast Boolit load of IMR4198 and the Lee .312 185RN cast boolit, sized .311" at 25 and then 100 yards. I found another cast boolit rifle in my heap! At 25 yards, the boolit was 2" high and dead center for Zero Windage. All 5 rounds were touching. At 100 yards, my boolit was about 6 inches high and center. With a lower front sight placement on the bullseye, my hits were point of aim.
I now have another cast boolit rifle here on the farm.
Adam