Lyman™ 548657 Single Cavity PlainsBullet Mold 54 Caliber - 450 Grain 548 Diameter Mold. The mold is made from solid leaded-steel and machined to an exacting, super smooth finish. All Lyman™ molds are heat treated which, causes the metal to appear blue in color. The mold features hardened steel alignment pins that provide you with years of bullet casting.

The mold's sprue plates are made from solid steel, which are ground flat and held tightly in place with tempered steel spring washers and screws. In addition, Lyman™ molds required break-in time is often half the time required for iron molds. Mold handles are not included.

Specifications: 

• Machined Leaded Steel Mold Blocks 
• Single Cavity Mold
• Steel Sprue Plate 
• Common Sizer Die Diameter: .548”
• Hardwood Handles are not included and must be purchased separately.
• Weights provided are Lyman's weights with suggested allow; actual weight may vary due to alloy mixture used.