Speer TMJ bullets are a premier choice for high-volume target shooters. Utilizing Uni-Cor technology, the lead core is completely encased in a seamless copper jacket, including the base. This eliminates exposed lead, reducing airborne toxins and compensator fouling. At 300 grains, these offer higher velocities and flatter trajectories than heavy bear loads, making them the ultimate practice projectile for powerful .50 caliber firearms. Defensive Application Non-expanding TMJ bullets pose extreme over-penetration risks. While high energy offers stopping power, they easily defeat walls. Use HP loads instead.