Help - Figureing out ballastic issues

[StoneHendge]

Don't know if you or anyone else did it or if you programs do it automatically, but if your using station pressure, you need to zero the altitude. You should also really use a G7 model to go out to 700/800 yards and beyond. Maybe one (both?) program are making adjustments? G1 declines with velocity.

I used a G7 of .255 for ELD I pulled off the World Wide Web somewhere when I was breaking in my barrel and it seemed close enough