I also use shooter it seems to work fine.
tried that one too, about 1 milrad out at 1000ydsI just use the Hornady ballistic calculator on their website. Seems to give me the right info for my .25-06. ATB
Ballistics Calculator - Hornady Manufacturing, Inc
26 inch 1 in 200mm twist, bullet speed 2860fps, scope height above center of bore,1.7 inches,142gr smks a bc of 0.595, temp 59 far,30.12 air pressure, 224f above sea level,zero distance 100yds
Good man --- thats the way to do it!!!!1.7 inches is from center of bore to center of the scope steve