40 S&W 155 GR. P-REX
Maker P-REX bullets are precision CNC machined, lead free, solid copper expanding projectiles. P-REX projectiles expand to meet FBI penetration requirements while maintaining nearly 100% of its original weight. Each P-REX projectile has been engineered to perform in a given velocity range to provide unparalleled performance across a wide variety of calibers and weapons platforms. Great for Defense.