None of my books, nor Hodgdon's website have load data for a 160gr cast boolit using IMR4895. They do have a 17.5gr starting load for that boolit with H4895. Go down the page to different 160gr factory bullets and they have data listed for both powders. All I need to know is if 17.5 will be a safe starting load to try the first 15 cast boolits. I very seriously doubt that I'll go ever go over 20grs of either.