Grendel as a Universal Infantry Cartridge

[JASmith]

I'm not sure if my calculations are right, so anyone please feel free to correct me.

If momentum density determines penetration of a CMU, to have performance comparable to a 147gr 7.62mm bullet at 2800 fps, a 100gr 6.5mm projectile would need a velocity of ~3000 fps. :eek:

...or possibly as skosh faster.

Yet, we see steel replacing lead in military ammo. That will cause the bullet to behave differently on impact. The 5.56 example suggests that a "green" 100 grain 6.5 projectile might do as well as the lead core 147gr FMJ.

Fortunately, the Lehigh Defense 95 grain Controlled Chaos bullet is available and inexpensive enough to try on a variety of targets. The results could prove interesting.