DC
I have used Blue Dot for many years with 2 3/4", 1 3/8 and 1 1/2 ounce loads with Federal shells, with good results. When I bought the clear 3" Fiocchi hulls from Ballistic Products (they are about 10 miles from my home), they recommended Longshot as being a better "cold weather" powder. So I tried it. I like Blue Dot better, but it takes up more space. The Fiocchi hulls don"t have as much internal volume as the one piece 3" Federal hulls.
To answer your question, yes I tried the Fiocchi hulls with Blue Dot. I loaded the shells with 34.0 grains of Blue Dot, a RP12 wad over a 0.070 card wad, and 1 3/4 ounces of shot. I could not use the BPGS because there wasn't enough room in the hull. I fired two shells at a temperature of 55 degrees. The velocities were 1079 and 752 fps. Again, that's at 55 degrees.
The best loads I have fired with the 3" Fiocchi's had 29.0 grains of Longshot, a 0.070 card, over a Ballistic Products Flex Seal wad, an old Herter's mylar wrap and 2.0cc of buffer. These loads had velocities of 1219, 1165 and 1212 fps, but the air temperature was 60 degrees. This load averaged a 72.3% pattern at 40 yards. My Federal loads average 84.1%, and that's without buffer. Since I hate to wound a pheasant (or anything for that matter), I stuck with my 3" Federal loads while hunting in South Dakota and Minnesota.
I may have to drop to a 1 5/8 ounce load with the Fiocchi's, and use Blue Dot powder if I can't get more 3" Federal hulls. I am also going to look at the "tool" Ballistic Product's has to decrease the size of the primer pocket so I can use the Federal 209A primers. Since it relies on compressing the base wad so that the primer pocket is squeezed smaller, I am affraid that it may loose the base wad.
Mike