Calculate drop for 6.5cm seems off...

[phantasm]

I am working up a ballistics table for my brother in laws deer gun and have two seperate results. One from my Kestrel (which matches AB Mobile) and another from the Hornady 4DOF calculator. I suspected less drop with the 6.5cm but cannot figure out where the isue is. Being a deer gun and his location it is likely never going to be shot over 500yds, but I built the table out to a 1000 in case he gets the chance to try it at longer ranges. I know this all needs to be trued as well but the drop data is throwing me off.

Rifle: Winchester XPR 6.5cm
Twist: 1:8
Site height: 1.75
Ammo: Winchester Ballistic Silvertip
Grain: 140gr
BC: G1/.509
Zero distance: 200yds
MV: 2,668fps

 

[wpeach1912]

Inches look weird, but the MOA amount is pretty much the same. Your wind input values are different though between the two apps which may account for some variance in elevation. If you do the math for what AB says to convert to inches it’s 353 inches.