Got a few friends in with the G-Men, and was telling about evaluating a 5.7X28mm pistol round. Marketed mostly by FN Hertal. He was telling me it was like a 40gr projectile that was kicking 2200fps, and penetrated the best Kevlar and had no recoil.

Said it was much more deadly than a 9mm nato round. I am sure these piercing rounds are for Law enforement only. Thought it was interesting.