The Speer #11 manual lists a max of 5.4 gr W231, CCI 500 primer, 158 gr SWC. I've shot several thousand rounds of this load in my revolver. Speer shows the same max 6.0 gr of Unique with a 6" revolver at 1034 fps and a 20" Marlin at 1294 fps. They suggest the lead bullet loads for small game and turkey.