i will be going hunting next weekend "deer" and need to sight in my 270 short mag..i know this lil bugger is very flat shooting. so at 100 yds do i need to sight it in one inch high? or two inches? or three? or what? i will be shooting probably 100-500 yards..with most shots being withing the 200-300yd range..but could still take a 50 yd shot if it arose? just need some advice on how to sight in this round. i have a 243 i take sometimes that i have sighted in one inch high at 100 yrds.