Something else about WST, a buddy and I shooting IPSC in Sacramento loaded our 200gr cast SWC .45's with 231 to Major Power Factor. We were a bit surprised when we attended an IPSC shoot near Reno, in the cooler and higher altitudes, and our ammo wasn't making the floor anymore! On advice, we switched to WST, and I've stayed with it since. I now use it for .38 Spl 148gr HBWC, .38 Spl 158gr SWC, 9mm Luger, and 9mm Steyr. It seems to burn just a smidgen cleaner than 231, also. The other nice thing is, the local shop tends to run out of 231 before WST, so I am reasonably assured of a can or two if I need it.