Originally posted by bwaites
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110gr Barnes solid ---- 0.452
100gr Lapua Scenar -- 0.424
103gr GS Custom ----- 0.454
95gr GS Custom ------ 0.424
I just don't see the proposed 90gr bullet having BC higher than maybe 0.395, at best. And that's if it's a scaled-down Barnes .308 TAC-TX per John's concept. If it's a Hornady GMX or Nosler E-Tip, I'd expect significantly lower.
That being said, I think the choice of 90 grains (or possibly even lighter weight) is preferable to the original 100 grains, at least insofar as a submission to Barnes is concerned. They already offer a 100gr TTSX, and might be reluctant to consider making another TTSX of the same weight.
Hornady and Nosler are somewhat a different matter, though. Since the GMX and E-Tips currently marketed weigh 120 grains, they may entertain a lightweight monometal bullet up to 100 grains.
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