Big Steve: I do reload and it seems like, the lighter the bullet and powder charge the more accurate it gets. I am using 185 grain swc with 5 grains of trail boss powder. I am not sure why the lighter loads make it more accurate. Maybe someone on here could shed some light on that.
I'm inclined to believe that certain combinations of bullet and powder tend to be the "just right" combination for your gun, regardless of powder and charge. You say 185 gr. But if you tinkered around long enough, maybe a 250 gr. or heavier would yeild the same results.