Absolutely, positively, irresponsible to shoot at a range you have not practiced at. You wanna shoot 500 yards take a few hundred shots on a 500 yard target.

Ballistics charts are pure math on very specific gun configurations. Stated ballistics seldom match when chronographed. Scope height, average temperature, barrel manufacture, and a whole bunch of other things cause stated ballistics not to be true. I have way too many holes in my 100 yard shooting house that came from people whoCALCULATED their shot.

Anybody out there that can calculate where a bullet will hit every time, call NASA, they have been looking for you.