Muskyhunter1its just a special screening of APP which is a couple dollars a can cheaper, some like it I get tighter groups with APP FF. Some like the FFF too again my Omega gets much better groups with FF, but part of the reason is I like to load for about 2,000 fps and FFF is better for light loads and heavy bullets I know that sounds like a contradition in terms but thats the way it has worked for me. Lee