I tried some BC confirmation testing today and ran into some puzzling conditions. First, I zeroed my 338 edge at 100 yards while gathering roughly a dozen velocity readings. I then backed out to 610 yards and 1053 yards, using my Kestrel with Horus, I plugged in the G1 of .818 for the OTMs. I also set up all of the parameters I could find, condtions, etc. The results I had were the center of my 5 shot group being 6.5" high at 610 yards and ~12" high at 1053 yards.
First, this sounded like a bad zero issue. I went straight back to 100 and it was still on. Next, I ran the solution on JBM and got the same solution (13.2 MOA & 30 MOA). What could I be missing here? Surely Berger didn't underpublish this BC by this great of an amount? From what I've heard, their estimates are usually accurate. I'm also running a relatively slow load of 2650 fps, so I wouldn't expect that to be the case..
Please help.
First, this sounded like a bad zero issue. I went straight back to 100 and it was still on. Next, I ran the solution on JBM and got the same solution (13.2 MOA & 30 MOA). What could I be missing here? Surely Berger didn't underpublish this BC by this great of an amount? From what I've heard, their estimates are usually accurate. I'm also running a relatively slow load of 2650 fps, so I wouldn't expect that to be the case..
Please help.