Re: BERGER 210 bc ???
Qualifiers to any bullet's BC is velocity, drag model, and a standard atmosphere.
The only bullet makers qualifying their BCs(for us) are Sierra, and Berger.
Sierra provides 1-3 G1 BCs by associated velocities at Std.Metro.
Berger's single G1 & G7 BCs account for reducing BC in flight via average BC to velocities, at ICAO.
Exbal would likely be less accurate using a single 'peak' BC (.631).
So I would use Berger's number (.616) if I were you.