The information is correct USING A 600 YARD ZERO. If you ZERO at 600 yards with the stated ammo, then yes, you will be "high" by the #'s given (in inches) at the appropriate ranges stated.

ETA: If you are zeroed at 100 yards, your bullet will only be @4" low at 200 yards, and @14.4" low at 300 yards.

These are rough figures for a 168 grain HPBT-Match style bullet leaving your barrel at approximately 2700 FPS, which is just a tad over the factory Federal Match load if I remember correctly.

Any good reloading book will give you the "Ballistic Coefficient" (BC) for a specific bullet. Basically, the BC of a bullet is a numerical figure that represents the bullets ability to overcome atmospheric resistance, or the "air resistance" as the bullet is in flight. The higher the BC, the more efficient the bullet travels through the air, thus, flatter trajectory.

For example, a 150 Grain Round Nose bullet has a BC of @ 0.266 while the same weight bullet in a Boat Tail Spitzer design has a BC of @ 0.423.

Know the BC of your bullet, the velocity in which it leaves your barrel, and any good Ballistic Coefficient table will give you data on the trajectory of the round in flight using various ZERO ranges. I have found the Speer BC tables to be quite accurate