My favorite 40 powder. Using jacketed FP 165 grain bullets, Win cases, CCI 500 primers at a 1.125" oal: 6.0 grains of WSF-970 fps, 6.3-1010 fps, and 6.6 grains of WSF showed 1060 fps in a Glock 23. My load is 6.4 grains for about 1020 fps. For Speer 165 Gold Dot HP's I use 6.6 grains at 1.120-1.123" oal.