Phazer
.450/400 Nitro Ex
This is interesting. Testing LA Police Gear level III budget-priced ceramic & polyethylene composite armor plates.
9mm from G19
M855 10.5" barrel
M855 16" barrel
Mil-surp 06 AP from on 03
12ga 00 buck x 4
6.5 Grendel 120gr OTM 16" barrel x 2
All were shot at 10 yards at the same plate. While the 06 AP did not penetrate, there was some serious deformation. Same after 4 shots of 12ga 00 Buck.
Only the second round of the Grendel finally penetrated the plate, but by then it was pretty much dust.