Interpreting a ballistics chart

[Art Eatman]

Being lazy and hating to think when taking a hunting shot, I merely memorized the rudiments of trajectories for the majority of "deer cartridges". This is in the muzzle-velocity range of roughly 2,600 to maybe 3,100 feet per second.

Two inches high at 100 yards makes for a 200-yard zero. Then, around five or six inches low at 300. 18 to 24 inches low at 400, so call it 21 inches. After that it's roughly four feet low at 500.

All I know is that it's worked for me for over forty years of dining on Bambi. Ranges for the kills have varied from 25 yards to 450. And mostly bang-flops, never any tracking.

 

[davidsog]

Now how do I interpret the 3rd line?

Point of Impact of the bullet will be 12.6 inches lower than the Point of Aim with a 100 yard zero single point zero and the Point of Impact will be 7.6 inches lower than the Point of Aim with a 200 yard single point zero.