Yes, but it isn't just 800X doing such oddities. 4759 did something similar. Go figure.
When this started I worked the faster powders first and filtered the more moderate burn rates as it progressed. Most of what I've seen in performance was expected, but there have been a few excursions such as those above which puzzle me.
My expectations, for whatever it might be worth, I'll wind up settling on something in the slower burn/higher load density. If it gets down to it I've some Rx7 and 4198 to fiddle with.
Per mention above, the SR4759 is tantalizing, but it has to reach a point where the powder burn is far more complete. I have room for about 9 grains before I start compressing the charge.
Still on the curve,
D
