View Single Post Old May 27, 2011, 08:19 AM   #9 Senior Member
Join Date: June 16, 2008 Location: Wyoming Posts: 9,161 I built
a Model 70 Vietnam Era Sniper rifle that I shoot at 1000 yard
matches.   I was just checking some old score books using a M14
Service Rifle in HP, including 1000 yard matches.  At 200 yards,
my zero is 12 clicks up. At 1000 its 48 clicks up (one min.
clicks). That with a 175 @ 2500 fps or so MV. Thats 36 MOA
difference.  One thing you need to put in the equation is that
if one shoots a 6 o'clock hold then @ 200 yards your point of
aim is about 3 min below your point of impact where as on the
1000 yard target your point of aim is about 2 min below the
point of impact (meaning you aim at the bottom of the black the
bullet will hit 2 or 3 minutes high.  So basically I think the
40 MOA sight change from 100 to 1000 should get you on paper.
Take into account the temperature difference. Consider that for
ever 15 degree change in temp, you impact will be 1 MOA off. You
sight your rifle in at