I used to use Green Dot and a Purple PC wad which produced a 1200 plus fps 1 oz. load under 7000 psi. The problem was that when it was below 20 degrees or so, it would not burn consistently and I could sometimes watch the shot leave the barrel. I switched to a faster burning powder(Titewad)and that problem went away. The pressure went up to just over 7000 psi., but no more squibs during late pheasant season.

Jim