http://www.eskimo.com/~jbm/calculati...traj_card.html
AR go to the above page and enter in your load information and print out the card at the end, you'll be set for next time. FWIW 400 is 26"+- and 700yds with a 223 is like a 22lr at 300yds (153" +- yeah thats 13 feet).