Range Report XM193 Velocity for 16 inch barrel

[GunDudeUSA]

On Federal's website it states that the XM193 FMJ Boat Tail is...

Velocity: 3165 ft/s
Ballistic Coefficient: 0.250
Barrel: 20 inches

So given that my Colt LE 6920 AR-15 is only 16 inches, what should be the correct velocity?

3165 - ((20 - 16) * 30)) = 3045 ft/s?

Also, I assume XM193 are G7 drag model?

Thanks!

 

[JL]

Re: XM193 Velocity for 16 inch barrel

Mine 3090fps summer MV with 16" Bushmaster. Matched exactly with ARFCOM MV table.
1,5yds from barrel, very low SD/ES. Measured with Oehler 35P.

I have been told that correct G7 BC for 55gr M193 FMJ is 0.120