...I also load my own version, using the excellent Rimrock Bullets 160 grain SWCHP gascheck. Member ArchangelCD - sadly recently departed - convinced to try HS-6 for this loading, and it is a humdinger! Gives great accuracy and velocity. However, current loading data for this propellant is beyond lame, and actually gives poor results. Using older data +P and a magnum primer, that load does 1060 fps out of the 4" gun and 995 fps out of the 2", both with excellent accuracy out to 50 yards. This load penetrates 14-16" and expands to .630". Suits me just fine...
How many grains of HS-6 were listed as being used in the older data +P?