My load workup started at 100 meters checking for ES and seating depth. They liked to "jump" 10 thou. But 100 meters doesn't always tell the whole story...
This five shot group was at 788 meters. Showing promise!! There was a slight breeze right to left. Top to bottom looked good.
Closer look at the AR 500 plate...
This morning I went out and shot, starting at 900M, 1110M then to 1700 meters, recording my runups. After tweaking JBM at home, it looks like a G7 of 0.422 did the trick....velocity is 2838fps. I had three shots in 12" circle on a large granite
rock at 1700 meters.
The barrel is a 28" Bartlein MTU, 1-9.7"