Thanks for posting.
I used the Appied Ballistics App on my iPhone and iPad. I also spend more time testing long range loads ( 1,000 yard ) by measuring variation in velocity with my LabRadar chronograph, but first I do a lot of work on prepping my projectiles to get the most consistent BC possible.
Sorting by weight and length
Meplat Trimming to exact length
Tipping to close the projectile end and increase the BC
Measuring the Baring Surface, not base to ogive
Re-Sorting by weight
The result is a set of my match projectiles. For certain one I start with Pre-Cut and Tipped Sierra Match Kings for both my 6mm and 6.5 long range bench rest rifles.
Variation in velocity can give you a lot of vertical spread at 1,000 yards.