New Army "Caliber Configuration Study"

[stanc]

Let's see 39mm to 43mm is a 10% increase in capacity.

Interpolating from the known data, 34.2gr would result in 2700fps and 2828fps. Now these calculations are elementary at best, but I think we could expect a MV in that range. If we were to see the military develop a canister powder I think we might see a MV in the 2800fps.

What say y'all am I completely off.

I think your numbers are in line with calculations on Tony Williams' MG&A forum. FWIW, consensus there is that a lead-free, military ball projectile would likely weigh no more than 108-112 grains. (The steel-core FMJ bullet of Wolf's steel cased ammo is reportedly 110 grains, which seems to confirm that idea.)