I have purchased some 7f from a guy in Arkansas called Gator Powder from Florida. Like firecracker powder. I mix with 4F for my flint pans. I found if I use straight 7F and it is damp outside, it sure absorbs more moisture or it seems to, caking up around the edge of my lock pan. Great stuff. One lb. will last a long time.

Mike

You don't quit playing because you get old, you get old because you quit playing!