Ammo Inc Signature, 45 ACP, 230 Grains, Total Metal Coating, 50 Round Box 45230TMC-A50 This .45 Auto 230gr TMC (Total Metal Coating) is from the Signature Ammo, Inc. Defensive line. Proven projectiles deliver terminal performance tuned for self defense. Load-specific development ensures extreme accuracy and consistency for each caliber. Balancing velocity, accuracy, and recoil, our development team carefully analyses every load to help our ballisticians achieve the specific outcome of superiority.