Range Report Sig Sauer Kilo3000 Bdx paired with Kestrell 5700 Elite link Questions

[Fulcrum]

hi , how accurate are these abl tools when you don’t have the BC data of a bullet ? Or is there a way to obtain the BC data of a specific load ?

 

[Sendit6.5]

The BC, or “ballistic coefficient” is a value that’s known and published for every bullet/projectile. Many boxes will list the BC for the particular bullet used in that loading. If not, the box will list the exact bullet used and a quick google search or a visit to the bullet maker’s website will give you the BC. That data is easy to obtain. The more variable data you need is your velocity. The more accurate the velocity you input into your Kestrel (and/or your 3000bdx app) the better results you’ll get with whichever software you use. The BEST thing you can do is to chronograph whatever load/ammo you want to use through YOUR own rifle! Depending on your barrel (particularly the length) and chamber your actual velocities will vary from what’s stated on the box; and environmental conditions will also effect velocity. If you give that Kestrel 5700 Elite good data, it will return some incredibly accurate shooting solutions. IF you don’t have access to a chronograph, use the velocity on the box to start; then shoot it out at 400-600yds (the further the better) and measure how low or high you’re ACTUALLY hitting - this difference can be input into your Kestrel and is called “truing” your software. Essentially, you’re just telling the computer what it got wrong, and by how much, so that it can use THAT (new data) to make further corrections and, ultimately, deliver you better firing solutions. It’s FAR better to start with your actual velocity at the barrel but starting with the box velocity will get you started and teach you how to enter data until you can get a chronograph. Don’t expect terrific results at 1000yds using this half-assed round-about method but it’s better than not getting any trigger time.

That’s a great setup! I’m using the same one currently and LOVE it! Luckily, I have a good chronograph. Hopefully you can get one or find one you can use.

Hope this helps in some way

 

[Fulcrum]

Thank you very much for the precious feedback and also thank you for sparing your time to explaining all this ?
I currently don't own a chronograph but i am searching for the most reliable one. I may consider Labradar doppler chronograph but on the other hand there are some negative reviews on amazon about Labradar too. We'll see.
The cartridge i've been trying get BC data is "ARM product 236 gr Lapua Stealth" Below i attach some photos of it
They replied to my email and claimed that the BC of it is .750 . I requested G7 BC but never got a reply
Can you give me your opinion about this product ?
I am also adding a comparison photo of it with a 250 gr Lapua Scenar ..

 

[Fulcrum]

The BC, or “ballistic coefficient” is a value that’s known and published for every bullet/projectile. Many boxes will list the BC for the particular bullet used in that loading. If not, the box will list the exact bullet used and a quick google search or a visit to the bullet maker’s website will give you the BC. That data is easy to obtain. The more variable data you need is your velocity. The more accurate the velocity you input into your Kestrel (and/or your 3000bdx app) the better results you’ll get with whichever software you use. The BEST thing you can do is to chronograph whatever load/ammo you want to use through YOUR own rifle! Depending on your barrel (particularly the length) and chamber your actual velocities will vary from what’s stated on the box; and environmental conditions will also effect velocity. If you give that Kestrel 5700 Elite good data, it will return some incredibly accurate shooting solutions. IF you don’t have access to a chronograph, use the velocity on the box to start; then shoot it out at 400-600yds (the further the better) and measure how low or high you’re ACTUALLY hitting - this difference can be input into your Kestrel and is called “truing” your software. Essentially, you’re just telling the computer what it got wrong, and by how much, so that it can use THAT (new data) to make further corrections and, ultimately, deliver you better firing solutions. It’s FAR better to start with your actual velocity at the barrel but starting with the box velocity will get you started and teach you how to enter data until you can get a chronograph. Don’t expect terrific results at 1000yds using this half-assed round-about method but it’s better than not getting any trigger time.

That’s a great setup! I’m using the same one currently and LOVE it! Luckily, I have a good chronograph. Hopefully you can get one or find one you can use.

Hope this helps in some way

Can you check my thread i guess i couldn't reply to you .. I attached photos of the specific cartridge. Thank you