I'm reloading the 38 Special with a 148 gr bullet; H&G #50, for use in a K-38 and a Model 52-2. I've been using 3.2 grs of Winchester 231, but I'm beginning to run short of it. W231 isn't available anywhere, nor it's alter ego, HP 38. How much of what powder do you recommend as a substitute for 231 for this application, realizing it has to be able to function a Model 52?