Nothing that new really. Lehigh has offered them for years for defense use.
https://www.lehighbullets.com/product/458-300-458-cqb/
Bullet Weight
97 grains
Bullet Length
1.100
Bullet Diameter
0.458"
Material 7075-T6 aluminum
Last edited by Gm54-120; 11-19-2016 at 05:25 AM.