Just tried some W231 in .40 S&W and loved it, removed quite a bit of the snappy recoil. Wife loves Win Autocomp and Ramshot Silhouette in .45 Problem is that Autocomp and Silhouette are some of the preferred powders for competing pro shooters. One of the LGS that I buy powder in allocates all Autocomp and Silhouette for their pro shooting customers. Autocomp is starting to appear more and more in online stores but Ramshot Silhouette is still tough to get. Just picked up some Hodgdon Longshot to try, also high velocity and low pressure. Wife bought me a Sig P220 Equinox for Xmas and its really picky on COL. With Autocomp, Silhouette and Longshot, I'm able to load 230gr .45acp down to 1.20" COL, normally seat to 1.23" and still feeds without issues. And PowerPistol, 24gr under a 350gr chunk of lead for my S&W 500 magnum is just great.