i came up with 1.5 at 100 high and 7 low at 300....maybe i should be changing my ammo
Why, what's wrong with it?
Throw "flat" out the window, especially with a .308 Win. No projectile flies "flat", yes some drop less than others, but that's it. Consistancy is THE most important thing, and the .308 is consistant all the way to 500 yards. I've sent thousands of them that far, and farther, and have obseved the .308 have the same trajectory no matter the environmental conditions.
Put my scope on your rifle, I'll dial to 3.0 Mils (54") and wear out 500 yards, no problem. If your rifle shoots that ammo consistantly, stick with it.