Link for phones
























10mm Underwood 140 gr Lehigh Defense  Extreme Penetrator fired from 4.5" barrel EAA Witness into calibrated 10% gelatin and Level IIA body armor.

BB: 588.4 fps, 3.7"


Gel results:

Impact velocity: 1,507 fps
Penetration: 25.9"
Retained weight: 140.4 gr
Max expansion: N/A
Min expansion: N/A


On the body armor test, the bullet passed completely through the vest, approximately four inches of clay, and two six inch water jugs. While the clay and water are not representative of actual wounding, it seems clear that this bullet would have been potentially fatal after passing through the armor. As you can see in the photo, the vest is rated for 158 gr .357 mag.

Impressive. What is the bullet made out of? Solid copper?

Yes, sir. Solid copper.