G1 vs G7 drag factor

Great app although it only calculates your drop based upon a G1 drag factor when the majority of bullets should actually be calculated using G7. You wouldnt think that it would equate to much correction but with my personal calculations as well as actual shooting Ive found G7 more accurate. Elevation is off by 47 yards(19 inches) at my 800 yd mark. It would be nice if I could choose between the 2 drag factors for a more realistic shot

Comedant about iStrelok, v2.60