The Hornady Custom Pistol Ammo 454 Casull 300 gr. XTP Mag brings the trusted Hornady Custom line to serious handgun shooters who demand deep penetration, reliable expansion and heavy terminal energy for hunting and duty use, with a 300 grain Hornady XTP Mag bullet pushing out approximately 1650 fps and about 1813 ft-lbs of muzzle energy to deliver controlled expansion of roughly 1 to 1.5 times its original diameter on impact. Designed for the 454 Casull, this round uses brass casings and is produced in the United States, making it easy to identify for those comparing 454 Casull ammo options for big-game handgun hunting, bear defense, or hard-hit backup rounds for off-duty professionals, while the XTP Mag bullet profile offers upsetting performance through heavy muscle and bone for rapid stopping power. If youre evaluating Hornady handgun ammunition for range testing, field use or patrol gear, the Custom series reputation among hunters and law enforcement combined with clear ballistic numbers like muzzle velocity and energy help you match load selection to intended game or threat, ensuring consistent shot placement and dependable terminal performance.