Well perusing both the Lyman & Lee data, the Lee bizarrely has no listing for 2400 in .357 at all. The Lyman shows a max load of 14.9gr under the 158 XTP doing 1280 fps out of a 4in barrel. Unique is in both, max 7.7gr for 1940 fps barrel length not listed, Lyman 8.3gr at 1185 fps. Lyman list the pressure for 2400 & unique as 41,800 and 38,300 C.U.P. respectively. Lee doesn't list pressure at all for its Unique load. And I'm noticing, uses both C.U.P. and PSI for different loads in the same caliber, which is very confusing and would seem to make it difficult to do apples to apples comparisons with different loads.
Does any of this sound workable? Do those numbers match up to y'all experiences? The disparities confound me.
https://www.youtube.com/watch?v=-fdhvg1mblQ