Win 231 powder is my favorite in the 45 ACP, I still have 16 pounds of it on hand.
I load 6.1 grs of W231 under Win 230 gr FMJ bullets in Starline brass, this is the same load I've used for a lot of years.
My old Pin loads were much hotter using W231.
Best Regards
Bob Hunter
www.huntercustoms.com