New Army "Caliber Configuration Study"

[woohoo]

Let's see 39mm to 43mm is a 10% increase in capacity. Using LRRPF52's data using 123 AMAX and CFE223 in a 14.5" barrel, http://www.65grendel.com/forum/showthrea...ot-Grendel
31.1gr 2489 fps
31.4gr 2520 fps
31.7gr 2532 fps
32.0gr 2553 fps
32.3gr 2572 fps
32.6gr 2598 fps
32.9gr 2612 fps

Increasing 31.1 gr by 10% is 34.2gr and increasing 32.9gr by 10% is 36.2gr. 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.

On a side note, I'd like to see how H4350 worked in that case.

NOTE: Interpolating outside the boundaries of known data will skew the results to some degree.

Apx 40gr H2O case capacity. Every 2mm increases the capacity 1.5gr when based on the Carcano case.
Carcano bass is in production, the brass Murray used is not. The powders that work best are the same ones used in the Grendel. 8208, CFE, N540. My 6.5x45 has a capacity of 42gr and will propel a 120 class bullet to apx 2800 from a 20" at near max pressure. The range of this 6.5x43 should be 2700-2750.
A case that long will feed from a Magpul 308 Pmag in any 308 AR10/SCAR/DPMS rifle.