Range Report what is the bc for m856 tracer round?

[martinez_ian]

I've found everything on this round except the bc. I've been having fun shooting my .223 @ 890 yds and i kinda think it would be cool to watch these tracers at that range. Just need some more data. Thanks.

 

[Rovieairto]

Re: what is the bc for m856 tracer round?

They should be around 0.30 (G1) to start.
Since its weight, and CG shift in flight, it may be difficult to model convetionally.

I'd guess it to average about 0.28 (G1) at distance, then see how it compares to actual testing.
You'll get instant feedback.

These projectiles are not accurate when I've shot them.
64 grain tracers are long, and the main reason for the 1-7 twist so make sure you have a 1-7 twist.
I kind of doubt that a 1-8 will do it unless you have a 20" or greater length barrel, and push em hard.