Re: ballistic calculators? Best One?
Nightforce NF Bal has been dead on for me with Berger Bullets and my Sendero 7mm Rem Mag out to 900+ yds.
I've had to make subtle adjustments for other rifles/calibers/bullets. But, it's always been close enough to get on target with minimal guess work.
...if only it would read the wind and dial the turrets
Actually, I think Barret has something pretty close to that.