Gentlemen, Thank you for your response. I am not finding a lot of info on the use of Universal Clays and the .32 W.C.F. cartridge. My 4" 1905 is serial number 65601 and does not have a heat treated cylinder. So I am cautious of pressure. I have been loading 100 gr. cast with several different powders. And while grouping is good, they have been 2" lower than point of aim consistently. So I am trying a heavier bullet.