I know that there are some powders that Winchester and Hodgdon sell that are identical, i.e. W231 and HP38. I read some time ago about the comparison between W540 and W571 and Hodgdon HS6 and HS7. Are these the same powders? I have some older powders that I am trying to use up, like Win 473AA, 452AA, AA20S, and I have worked up handgun loads for these pretty easily.

"If it ain't cooked in bacon grease it ain't worth eatin'"