I have that Handloader magazine . Brian Pearce , using the double crimp bullet , (Lyman 358156 ) with 12.0 grs of 2400 powder recorded an average velocity of 1216 fps . Using the Keith 173 gr swc , 12.0 grs of 2400 yielded 1230 fps . These were fired from a 38-44 , 6.5" barrel ( pre model 27) using CCI 500 primers . To get back into the 1100 + fps I would start with 11.0 grs of 2400 . A chronograph will be your friend to get it more exact . I hope this helps , regards Paul