whats the rule of thumb for shooting uphill? my 12 yr old is shooting a savage 243 100gr... I ranged the buck at 441yards with my geovids, deer was maybe 6-700 feet vertically up the hill from us... we put swarovski tds plex on 12x(200yrd zero)... software says 3rd line down is 461 yards... I set up the tripod and the Claw and he took a shot. 1st shot 2-3ft high 2nd shot lined up at 2nd line(381 yrds) still too high 3rd shot, shot the gap, 1st line(283) on top of back and he shot maybe 2in high... deer ran off what up?