As I said, I was not shooting long distance so if it had lost fps there would be little effect on the accuracy. But that old Pyrodex shot just fine. And that Clean Shot I purchased, even though that was old I shot roundball off with it out of a couple rifles and it was amazing to see how accurate it was. I was almost sad when it was finally all shot off. One reason I purchased APP after that. Strange thing is, the APP did not shoot as well as the Clean Shot. The only powder I found that worked as good was Pinnacle. That is a good powder.