ORIGINAL: green01
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.
You have assumed that the bullet was already decending in relation to the line of sight at 100 yards, In other words crossing zero for the second time. His midrange groups show that did not happen, his bullet is crossing zero for the FIRST time at 100 yards. It started out some 3" inches low and got to the line of sight at 100 yards so it is still climbing at that point. I don't know where it will peak or how high it will be when it does, nor do I know at what range it will cross zero again.