IIRC from paulo's test H335 and h322....
Thanks paulo, I still have a ton to learn with the powder stuff, I figured (incorrectly) that H322 and H335 were the same types of powder but different preassure curves..Most ball powders will loose 100 FPS from 100-0 degrees. X-Terminator was even worse at 150 FPS. The Hodgdon Extreme powders (H4198, H322, Benchmark, H4895, Varget) are the best and will only loose 25-50 FPS.