Zak Smith
Member
While shooting this weekend, we had an opportunity to shoot a 1672 yard target. 10x10" square hung diagonally, so 0.57 MOA on the diagonal or about the same area as a 0.65 MOA circle.
Just for grins, I engaged it with my 260 (139's @ 2780 - 2800 fps). I had no dope past 1000 with me, so we had to guess. I started with twice my 1000-yard dope, which was way short and not spottable. Next I cranked it up to max (about 21.5-22 mils on my PMII), which we spotted as impacting approx 3.5 mils high.
I made a couple corrections, and then was "right in there". I hit it on round #6 using 18.7 mils of elevation from a 100-yard zero.
This was approx 60F at 6700'. JBM predicts 17.4 - 17.7 mils (dep on velocity) and 1241 fps terminal velocity, or about 11% over mach 1.
There was likely some headwind. I merely "favored" the LHS for windage.
The 10" plate was mightly small through the 3-12x50 PMII set at 12x. I stopped after the hit on round 6, knowing I was ahead...
............... Larger version of above photo.
Just for grins, I engaged it with my 260 (139's @ 2780 - 2800 fps). I had no dope past 1000 with me, so we had to guess. I started with twice my 1000-yard dope, which was way short and not spottable. Next I cranked it up to max (about 21.5-22 mils on my PMII), which we spotted as impacting approx 3.5 mils high.
I made a couple corrections, and then was "right in there". I hit it on round #6 using 18.7 mils of elevation from a 100-yard zero.
This was approx 60F at 6700'. JBM predicts 17.4 - 17.7 mils (dep on velocity) and 1241 fps terminal velocity, or about 11% over mach 1.
There was likely some headwind. I merely "favored" the LHS for windage.
The 10" plate was mightly small through the 3-12x50 PMII set at 12x. I stopped after the hit on round 6, knowing I was ahead...
............... Larger version of above photo.