Calculating BC for an unknown bullet?

[Awag1000]

I plan on making some Solid copper Bullets on my lathe but I have no idea how to calculate the BC of this bullet. If anyone has experience with this please let me know.
its probably going to be more trouble than its worth. thanks for your time.

 

[BLKWLFK9]

Walk it out to distance, record velocity and play with BC numbers until it matches

 

[Awag1000]

Walk it out to distance, record velocity and play with BC numbers until it matches

wow, I didnt think it would be that easy to do. ill have to try it out. thanks

 

[BLKWLFK9]

wow, I didnt think it would be that easy to do. ill have to try it out. thanks

It could be tedious but it will work. No different than calculating MV with a known BC. This is just opposite.

 

[Steel head]

Walk it out to distance, record velocity and play with BC numbers until it matches

This
Same way we confirm/true right now.

 

[Lowlight]

Coldbore 1.0 has tools to do this, if you are a Windows computer user, Download Coldbore, it's what i used to nail the Warner BC and it was backed up by Hornady using their doppler. I was within 1% of Doppler

But as noted, you need MV and information at both the shooter and target.

 

[Jack Master]

This actually isn't to bad of a start from a mathematical standpoint -
Wikipedia - Ballistic Coefficient.