The Lyman Rifle Bullet Mould: .375/.38-55 Caliber - #375449 Double Cavity (SKU: LY-M60449) is a heavy-duty, precision-machined casting block engineered for handloaders who demand highly consistent projectiles. Constructed from solid, leaded-steel blocks, this mould is heat-treated and pre-blued at the factory to reduce the break-in period and provide long-term resistance to corrosion. Unlike aluminum alternatives, the robust steel construction retains heat exceptionally well, ensuring uniform metal flow and highly consistent bullet weights. As a purely mechanical, non-powered hand tool, it requires no electrical connection, making it fully compatible with Australian reloading benches without the need for 240V power or local electrical certifications.

Key Features:

• Double Cavity Efficiency: Casts two identical 264-grain bullets simultaneously, doubling your production rate compared to single-cavity moulds.
• Solid Steel Construction: Machined from solid steel blocks to an ultra-fine finish, offering superior durability and thermal stability over aluminum moulds.
• Hardened Alignment Pins: Features hardened steel alignment pins that ensure the two halves of the mould align perfectly every time, minimizing parting lines and preventing out-of-round cast bullets.
• Gas Check Design: The cast projectile features a heel designed to accept a copper gas check, allowing the lead bullet to be driven at higher velocities without causing severe barrel leading.
• Flat Nose Profile: The flat-nose design makes the cast bullets completely safe for use in tubular magazine rifles, preventing accidental primer ignition under recoil.

Technical Specifications:

• Manufacturer Part Number: LY-M60449 (Lyman production code 2660449)
• Compatible Calibers: .375 Caliber, specifically optimized for .375 H&H Magnum, .375 Winchester, and .38-55 WCF
• Bullet Weight: 264 grains (gr)
• Bullet Profile: Flat Nose (FN) with Gas Check (GC) base
• As-Cast Diameter: Nominally casts between .377 inch and .379 inch, depending on the specific lead alloy used
• Required Accessories: Requires Lyman Double Cavity Mold Handles and Lyman Top Punch #449 for sizing and lubricating (both sold separately)
• Power Requirements: None (fully manual mechanical tool)

Who It Is For:

This Lyman double-cavity mould is designed for Australian handloaders, target shooters, and hunters who reload for classic and modern .375-caliber rifles. It is particularly suited for owners of lever-action rifles chambered in .38-55 WCF or .375 Winchester, such as the Winchester Model 94 or Marlin 336, where the flat-nose bullet profile is a safety requirement for tubular magazines. It is also highly effective for casting heavy, gas-checked projectiles for the .375 H&H Magnum. Because bullet casting involves melting lead alloys, users should operate this tool in well-ventilated outdoor or dedicated workshop spaces in accordance with local Australian safety guidelines regarding lead exposure.