RCBS Cowboy Bullet Mould - Double Cavity .309" 150 gr

The RCBS Cowboy Bullet Mould – Double Cavity .309" 150 gr is a precision casting tool designed for serious handloaders who demand consistency in projectile weight and geometry. Built from solid cast iron and precision-ground square, this mould delivers the dimensional accuracy required for match-grade ammunition while maintaining the durability needed for high-volume casting operations. The double-cavity design increases production efficiency without compromising the dimensional consistency that separates precision reloads from standard factory ammunition.

The mould features a 3/16-inch solid steel sprue plate secured with tempered steel spring washers and screws, ensuring repeatable sprue weight control across every casting cycle. Steel alignment pins keep the cavity blocks firmly indexed together, preventing the dimensional drift that occurs in moulds with loose-fitting components—critical for maintaining the .309" diameter and 150-grain weight specification. The precision-ground surfaces remain true even after extended use, a performance advantage that extends mould life and consistency over time. This construction approach is standard among RCBS casting products and reflects the company's commitment to tolerances that matter in competitive and precision loading.

This mould is ideal for handloaders casting .309" diameter projectiles for specialized caliber work or historical rifle ammunition. Serious reloaders who prioritize shot-to-shot consistency in custom ammunition will benefit from the precision alignment and cast-iron durability. Whether you're loading for benchmark accuracy testing, long-range hunting, or specialty cartridge applications, a precision-ground double-cavity mould reduces variables in the casting phase of the reloading process.

RCBS casting moulds have been the industry standard among handloaders for decades, recognized for tight tolerances and reliable performance across high-volume production. The double-cavity configuration balances speed with precision—a characteristic that appeals to both competitive benchrest loaders and high-volume custom ammunition producers who cannot accept variance in projectile specifications.