I know powders can be used for many calibers...but I just bought 3 1 pound cans of Winchester Action Pistol..$5 pound. What would be the best cals to use it in?? I mean...the price WAS right but...Someone here must have used it for something....I also got 8 pounds of 231...same price. I've never used AP but have the idea it may be good for 9mm 40 S&W etc... which I don't load