The Sierra Sports Master 300 grain Jacketed Soft Point (JSP) is a heavy handgun bullet produced by Sierra. It is offered in boxes of 50 and is intended for high-pressure, high-performance handgun handloads in the strongest .45-caliber revolvers and single-shot pistols. The design emphasizes controlled expansion at very high velocities and robust construction for demanding handgun applications.
Key Specifications
- The manufacturer is Sierra.
- The bullet weight is 300 grains.
- The bullet type is Jacketed Soft Point (JSP).
- Packaging quantity is 50 rounds per box.
- The core alloy is a 90% lead, 6% antimony, 4% tin blend as specified by the manufacturer.
- Maximum published velocity for expansion is up to 1550 fps when driven at top-end handgun velocities per manufacturer notes.
- Recommended platforms include strong .45 Colt revolvers, single-shot T/C Contenders, and .454 Casull revolvers.
- This bullet is not suitable for use in Colt Single Action Army revolvers or their modern reproductions due to overall length and construction.
- The product introduction year listed by the manufacturer is 1994.
Engineered for handloaders and shooters who need a robust, heavy-for-caliber handgun bullet, the Sierra Sports Master 300 gr JSP offers predictable performance at high velocities in appropriately strong firearms. Its solid construction and specific alloy core make it a considered choice for experienced reloaders configuring heavy .45-caliber loads where controlled expansion and deep placement are required. Review platform suitability and load data carefully before use to ensure safe operation in your firearm.
This description was generated with AI and may contain errors. Verify specifications and legal restrictions with the manufacturer before purchase. Provided “as-is” without warranties or guarantees.
