Alan Griffith
Well-Known Member
Could mirage cause my POI to be as much as 9-10\" high at 600 yds?
Here are the specs
30-06 Ackley, 180 Nosler 180 BT (.507 BC) at 3050 fps. Nikon 4.5-14x40 Buckmaster w/ mildot. 300 yd zero, level muzzle elev. 74 deg F. Sight height 1.8". 4960 ft Altitude. I had just shot 300, 400 and 500 yd groups prior to the 600 yd group. They were right on for altitude. The 600 yd group was into 4.75" but 9-10" high. 1/4 MOA clicks or 1.5" each click at 600 yds. Drop, according to
http://www.handloads.com/calc/
should be 46.83". I clicked up 32 clicks. My POI indicated I should have only clicked up 26 clicks.
Any ideas or suggestions? Could mirage have moved my POI up that far?
Here are the specs
30-06 Ackley, 180 Nosler 180 BT (.507 BC) at 3050 fps. Nikon 4.5-14x40 Buckmaster w/ mildot. 300 yd zero, level muzzle elev. 74 deg F. Sight height 1.8". 4960 ft Altitude. I had just shot 300, 400 and 500 yd groups prior to the 600 yd group. They were right on for altitude. The 600 yd group was into 4.75" but 9-10" high. 1/4 MOA clicks or 1.5" each click at 600 yds. Drop, according to
http://www.handloads.com/calc/
should be 46.83". I clicked up 32 clicks. My POI indicated I should have only clicked up 26 clicks.
Any ideas or suggestions? Could mirage have moved my POI up that far?