New Army "Caliber Configuration Study"

[stanc]

The question is, would 6.5 Grendel w/108gr bullet be outranged by 7.62x54R w/148gr bullet, when 65G is fired from a 16" barrel?

Legitimate question. However I'm thinking you're narrowing the scope down to much, as a projectile hasn't been designed yet. I'd think we'd keep it open to the 105-115gr range, at a minimum.

I am open to a different weight. In my example, I was using Tony's hypothetical, scaled-up 7N6 bullet, which he says would weigh 7 grams (108 grains) in 6.5mm.

Consensus of the subject matter experts on his MG&A forum is that 7.2 grams (111 grains) is about the maximum practical weight for a lead-free 6.5mm bullet. Since I have no information to the contrary, 108 grains seemed like a reasonable weight.

I would note that the steel-core FMJ bullet in the mythical Wolf steel-cased ammo is even lighter, at 100 grains.