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What causes ballistic app errors

Ryeguy

Well-Known Member
Joined
Mar 22, 2014
Messages
111
Location
No. Dak
While shooting today I shot out to 550 & 650yrds and to get on target I had to subtract 2moa off each yardage call. That's all I had time and ammo for but curious if anyone knew what would cause this? Yes I'm pretty sure all my info is correct. Between 2 apps, 4dof and Eagle ballistics they had but the same call.
Shooting 338 NM. 300 gn Bergers 2840fps.
650 call was 12.15. I got on target at 10.
This a scope issue? Any help appreciated. I know i need to start working back from 100 and see exactly where it falls off but didn't have time today.
Edit: BC and 100 yrs zero was off a bit. Might have it figured out
 
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It's a wonderful life when things work.. not so much otherwise.. I did a tall target test.. found my scopes were tracking high… took awhile to figure out how to adjust in the app, but all is well now.. old dogs can learn new tricks!
 
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