Doctrine and why the Grendel has an uphill battle.

[stanc]

Also, we have gone over the Half Kilometer article a couple of times. Also the kinetic energy of issued ammo and match grade 6.5 bullets and found the comparisons to be flawed because the military is not about to buy match grade bullets and issue them as ball ammo. I know that guys have thrown around the notion of two Grendel loads, one for a MG that would use a 140 grain bullet and one for the rifleman with a bullet weighing around 120 grains.

Considering the rifleman and this theoretical 120 grain bullet, it will probably have a BC of about .300 at best and a MV of about 2450 at best from a issued carbine.

The "two load" proposal would never fly. The Army tried that approach a couple of times in the past, and dropped it in favor of a single, general issue load for rifles and machine guns.

I have to note that you're too pessimistic about the BC of a 120gr 6.5mm ball projectile. The Norma 120gr FMJ is listed with a 0.428 BC, which is comparable to that of 147gr M80 Ball.

However, a hypothetical ball round for 6.5 Grendel would undoubtedly be of the lead-free EPR design, so we're looking at a bullet weight circa 105 grains, which would affect BC and MV.