My usual coated lead SWC loads for .44 Mag and .44 Spl, both used in a 4.25" S&W M-69, is 10 gr and 7.5 gr, respectively, of Alliant Unique. To duplicate these loads, can I directly substitute Hodgdon Universal for the Unique? I have seen this suggested and also have seen it suggested that a couple of tenths grains more of Universal are needed to equal the Unique load. I do not have a chronograph. I have seen burn rate charts that show Universal right next to Unique. Anyone have a definitive answer? I can make a guess myself, but I don't like guesses when it comes to loading ammo. Thanks!
