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They (Nosler) also have a 210 gr .30 cal with a B.C. of .730
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I doubt that BC is correct.
Compared to Sierra's 30 caliber 240-gr. HPMK bullet with about a third more sectional density, 30 grains more weight and both having a near identical shape and length, Sierra's BC of .711 seems realistic to me over Noslers .730 BC claim for their lighter and less dense one.
Sierra calculates BC's based on time of flight between two points the the velocity through each one for their bullets. I've no idea how Nosler calculates BC's; probably by math based on shape and weight; a good example of doing most of the wrong stuff. Nosler's got a bunch of other ballistic and accuracy ideas that are way off the mark of reality, in my opinion. But their hunting bullets are excellent.