SLAMFIRE just cannot happen. if you sight your .270 dead on 100 yards everthing after that is down hill. even at a 100yards zero your bullet cross hairs between 70 and 80 yards. there is no load that i know of that can hold that line if zeroed at 100 yards. even a 22-250 with a 45 grain if zeroed at 100 yards will never be high after the 100yard mark. you are forgetting one thing GRAVITY. just cannot happen.