| Round | Velocity (ft/s) |
|---|---|
| 9mm FMJ RN | ~1,400 ft/s |
| .357 SIG FMJ FN | ~1,400 ft/s |
| .44-mag SJHP | ~1,400 ft/s |
In addition to stopping penetration, the helmet must limit backface deformation to reduce blunt force trauma.
To learn more about the NIJ body armor standards, read our Understanding Body Armor Ratings article.