What would be the correct drag model to use for a .223 (77gr SMK)? I'm using the shooter app on my droid. I have it set for G1 and the drop at 300 yards is fairly close to the published MV for the load I'm using (24gr AA2520) I've read that G7 is more accurate for HPBT bullets, however when I use the G7, I have to drop the MV significantly to match my drop data. I plan on collecting more data, but for now its driving me crazy not knowing what the correct approach should be with the ballistic calc.