I think JD was talking about the Berger 180 7mm bullets.With a B.C of .698 I am a huge fan of the 7mm bullets and caliber but you will not be dissapointed with a 30 cal. either.
My recommendation on a 30 cal., would be a plain ol' .300 ultra match, set up for the 210's. Nosler makes some really good cases for the .300RUM at a very reasonable price. If you are set on the .30-.378 weatherby I would recommend an improved version. Also JD's advice on the .300-.338 Lapua is right on. Best wishes on your project and it sounds like your going to have an awesome long range gun.
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