Using Kestrel 5700 AB with .22 LR

[wpgk58]

I am new to the precision .22 LR game, but have some experience in the 6.5/6.0 CM.
I have chronoed three ammos and found the most consistent to be the Anguila Match.
When I go to enter the data into my Kestrel, there is only one .22 LR 40 grain available. I plugged in the data and the results seem to work out to 100 yards.
My question is how do I find out the actual BC and accurately put it into the Kestrel?
or am I chasing something that will make little difference?

 

[E. Bryant]

You can either plug in something that's close and tweak it until the prediction matches your real-world results (always a valid approach for unknown projectiles), or you can check out pages 195-197 of Brian Litz's "Modern Advancements in Long Range Shooting - Volume II". The chart shows a value of 0.116 for Aguila Golden Eagle Match Rifle.

 

[billmeek]

If you can get the chrono value at 2 distances (2 chronos or using a LabRadar), then you can calculate the BC the same way I do:

https://www.snipershide.com/shooting/threads/ballistic-coefficient-calculating.6924581/

Just remember that the best spread values do not necessarily equate to the most accurate ammo in 22LR. Only through experimentation can you find the best ammo for a given rifle.

 

[davere]

You likely need to go out further than 100y to really true it - but there's a number of rimfire bullets available in the current bullet library. Unfortunately, the only Aguila in there is a 60gr. If you look under .224 and .222 bullets, you'll find a number with "(Rimfire)" after the manufacturer name. You'll find the bullets under those entries. If you can find one that physically looks close, you may find the BC or CDM to be close enough to the Aguila that you can easily tune it from there.