AB Mobile - multiple bullet profiles?

[BoilerUP]

Question that perhaps has been asked-and-answered before and I missed it...

Looking at the 6mm 107gr SMK data on my iOS version of AB Mobile, I see Litz has the pointed 107 at 0.256 G7, which is lower than the 0.261 of the original unpointed 107s. I also notice there is a recent addition of the 107SMK, labeled BH7IBI107SMK, that shows a G7 of 0.278.

There's also near a dozen different profiles for the 105 Hybrid.

What does the text inside the parenthesis for these profiles designate?

 

[Bob2650]

Personalized Drag Models

 

[BoilerUP]

Personalized Drag Models

So how does a personalized drag model get made, then get put on the app for all to see without those results updating the previous test?

I can perhaps understand slight variations between lots, but some of the deltas between Litz' original bullet test and some of these parenthesis models are substantial.

Thanks for the insight...

 

[Bob2650]

If you google Personalized Drag Model
You can find a post on another site about AB bringing a doppler radar system to some matches and measuring some top competitor's ballistics during the match.
I am a high master but far from the description "top competitor" in long range which explains why I have never witnessed this at a match.

 

[Hollywood 6mm]

They had the Applied Ballistics mobile lab out at the Precision Rifle Expo, and the Kestrel Fall Classic at Altus a couple weekends ago to offer PDMs to people. As far as I know, those are the only two events where that's been offered so far.