The Magnum primers really did the trick. Those loads are now averaging 850 fps and very uniform reading. I think I will try the Trail Boss when this cab of Tite Group is gone. The 160 grain bullets with that load are about like shooting a 22 Magnum. The 6.0 grains of Tite Group really worked well with the 255 Grain Hornady's They are also right at 850 fps. The suprise was the 160 grain loads that shot about 850 fps in the 6 inch Ruger, shot 1101 fps from the 22" H&R 45 LC Buffalo Classic. The 255 grainers shot 960 fps from the rifle.