As promised here's my Super Test!
https://youtu.be/1irzH27Ix0A?si=HzD0d0WlzgmfRbRz
All charges were 65gr by weight and the Lee 459-500-3R Boolit with an unlubed wood wad under it. Distance was 50 Yards. Rifle was the CVA Accura in 45 Cal.
Here's the numbers:
GP 588 (cold bore), 666: Avg 621 Gouping 3"
CP 918, 904, 898: Avg 906 Grouping "One Hole"
Balsa Corned 1097, 1120, 1034: Avg 1083 Grouping 2.5" Vertical String
Weeping Willow Screened w/SGRS 877, 917, 897: Avg 897 Grouping "One Hole"
In short, the Crimson perfectly matched my old stand by Screened Willow with Rice Starch binder 3%. The GP fell short. Seeing how screened powder isn't that much harder to make than Crimson I don't have much use for it, but it's still nice to know it works and it works really well. Keep in mind, for my Crimson I added the Iron and Carbon after there was color change, and I did not mill my carbon. It simply went through the meat grinder once.