Sierra Sports Master Handgun Bullets .45 cal .451" 300 gr JSP 50/ct

The Sierra Sports Master Handgun Bullets .45 caliber .451" 300 grain Jacketed Soft Point (JSP) is engineered for heavy-recoil revolver platforms and large-bore handgun cartridges where premium bullet construction is non-negotiable. Despite its soft point designation, this 300-grain JSP represents one of the hardest bullet designs Sierra has produced, featuring a specialized 90% lead, 6% antimony, 4% tin alloy core that resists expansion except under extreme velocity conditions—making it purpose-built for the strongest .45 Colt revolvers, single-shot pistol platforms like the Thompson Contender, and magnum-class handgun applications.

The 300-grain weight delivers substantial sectional density and momentum, critical characteristics for penetration on large game or when operating at the velocity ceiling (.45 Colt velocities reaching 1550 fps from Freedom Arms, Dan Wesson, and Ruger revolvers). The jacketed construction minimizes barrel leading—a practical concern when handloading high-velocity loads in these platforms. This bullet design prioritizes deep, reliable performance over rapid expansion, making it suitable only for operators and handloaders who understand magnum-class handgun ballistics and have firearms capable of safely handling top-end pressures and velocities.

Ideal for serious .45 Colt and single-shot pistol handloaders, competitive shooters working with large-bore revolver platforms, and hunters pursuing heavy game with maximum-power revolver loads. This ammunition component is not suitable for standard pressure loads or firearms with velocity limitations. The 50-count box format allows precision handloaders to develop and test custom loads without excessive material commitment, supporting both field validation and range development cycles.

Large-bore revolver and single-shot pistol handloading demands bullets engineered for the extreme conditions these platforms generate. Sierra's reputation in the handloading community rests on consistent quality and precise specifications across production runs, ensuring reliable ballistic performance when loaded to published maximum velocities.