New Army "Caliber Configuration Study"

[BluntForceTrauma]

I want to run some numbers, making a comparison between this GS Custom 6.5mm 112gr monolithic with a PKM 7.62x54R round.

Any educated guesses as to a realistic velocity from a 16" barrel for a 112gr with at least a 0.523 BC from the 6.5 Grendel case? I'm thinking if we have a Grendelized M855A1 that it would have a similar form factor to the GS Custom 6.5 112gr, perhaps a bit lighter if the steel core is less dense than copper.

John

P.S. I'm going to compare it to a 7.62x54R round from a PKM 25.4" barrel, with a 148gr bullet at 2,717 fps with a 0.350 BC. I've guesstimated the BC, since internet sources vary so widely. Sierra bullets lists a BC of 0.397 for its .308 150gr FMJBT. If I'm being unfair to the Russian, speak now.