I have some Winchester auto comp powder I would like to use for 38 special with 125grain extreme plated bullets. I have got the load data from hodgdon and lee manual and the load data for cast lrnfp and xtp are the same grains different pressures(5.7-6.2gr). Extreme recommends using high end lead data or mid range jacketed data. I am thinking of starting with 6.0 grains. Does anyone have any experience with this powder for 38 special?