I made up some loads for my BH in 357 mag. I was using 9.5 gr. od HS-6 powder pushing a 140 gr XTP. Mostly, it seems to shoot fine. Getting it fine-tuned will take practice on my part. I'm waiting for some 158 gr. to come in so I can use the slower buring Lil Gun. The question is according to the speer man., it says 9.8 gr. for a 140 XTP is max. And then hodgdon says 9.5 to 10.5 for the 140. The gun seems to shoot high with the loads of 9.5 gr. I guess I'll try 9.0 of HS-6 til the 158 gr. come in. What say you the RUGER GURU'S?