I have an 1917 Colt New Service in .455 Eley. I am using Stareline .45 cowboy brass. I was using .45 auto with half moon clips until I found 45 Long Colt brass would work if I cut down the case to auto length. The bullet I an using is a 230 gr. flat nose with 5 grains of Unique. The gun shoots about 4 inches low at 30 feet even with 6 grains of powder. Does anyone have a load that will shoot to the point of aim? I do not want to file the sights if possible.
Thanks
Nick