Ballistic App Validation

Joined
Sep 24, 2018
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I am using the Shooter app and am still pretty new at it. I went to the range and chronoed my loads. Putt all the data in and then validated. There was a 20fps velocity calibration on the data. Fast forward three more range sessions and the variance of impact is not the same once I have updated the environmental conditions.

My question is how do I get the most out of these apps? Is it just expected that there is going to be some variance once you have validated the data? I don't get why the chorno data would start to vary significantly after validation.
 
Keep a close eye on the conditions you validate at. Something that small, could be a matter of a little mirage, some wind, or a temp change on your powder.


How far did you validate at?

Iv never used that App, usually hornady or strelok

For example, I validated a load out to 1000yds with some mirage, went to a match and was hitting high on everything. Re validated without the mirage, and was back to normal.
 
Keep a close eye on the conditions you validate at. Something that small, could be a matter of a little mirage, some wind, or a temp change on your powder.


How far did you validate at?

Iv never used that App, usually hornady or strelok

For example, I validated a load out to 1000yds with some mirage, went to a match and was hitting high on everything. Re validated without the mirage, and was back to normal.

I validated from 400M to 800M (880 yards). If I am understanding your advice it is to validate in ideal conditions and then account for things like mirage when the conditions change?
 
Download the Hornady 4DOF App and watch their walk through video. It will explain how to true the app to your specific load.
 
Measure actual drop on target at multiple distances, use correct environmental info (I prefer density altitude), then use that to tweak BC alone if possible to to get projected ballistic solution to match actual field results.

Ballistic programs are pretty damned good (properly tweaked I can rely on Shooter/Ballistic AE/Strelok to be within .1mil), but they rely on accurate input to match reality.
Garbage in=garbage out
 
I validated from 400M to 800M (880 yards). If I am understanding your advice it is to validate in ideal conditions and then account for things like mirage when the conditions change?

Verify in the best conditions you can. I’d also second some of the above and try another app, also make sure to be entering accurate data
 
Thanks for the feedback all. I tape my shots through the spotter and am definitely thinking my problem was mirage. I was not giving it enough credit for POI change.

I use a kestrel and had confirmed zero before starting range session.
 
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