AR Comp loads running very slow

[300BLK]

I promise I will return to 6ARC loads using AR Comp once I get this figured out. AR Comp was recommended for the 6ARC 103 ELDX by a forum friend. I'm working in 223/556 due to available data from Alliant.

In the meantime breaking down my powder comparison using 2 different Alliant powders in 223 with 55SBK and 25.6gr charge with outside temps around 50f

Comp is negligibly slower with the same charge. Probably within the margin of error pretty much a draw. Close enough that I suspect I may have gotten a pound of RL 15 in a Comp bottle.

RE-15 2785 28.7sd QL estimates 2796
Comp 2755 35.2sd QL estimates 3101


From Alliant I found comparative load data showing both powders using a Sierra 69gr HPBT

Same speed with 2.3gr less charge required for Comp

RE 15 2956 with a 25.5gr charge
Comp 2969 with a 23.2 gr charge

Load data: https://www.alliantpowder.com/reloaders/...ulletid=91