Lyman MSR Precision 4-Die Set 450 Bushmaster

The Lyman MSR Precision 4-Die Set for .450 Bushmaster (part no. 7690108) is engineered specifically for modern sporting rifle ammunition, built to feed reliably in semi-auto actions. Lyman includes an Ammo Checker cartridge Go gauge with every set, and pairs a small base sizing die for smooth chambering with a separate taper crimp die for a tight bullet grip. It’s built for .450 Bushmaster handloaders running an AR-platform rifle.

Key Specifications

• Chambered for .450 Bushmaster sized specifically for this modern sporting rifle cartridge.
• Engineered specifically for MSR ammunition built for reliable semi-auto chambering.
• 4-die set the .450 Bushmaster configuration in Lyman’s MSR Precision lineup.
• Ammo Checker cartridge Go gauge included lets you verify finished rounds will chamber before heading to the range.
• Small base sizing die sizes cases slightly smaller than standard for smooth chambering in semi-auto actions.
• Separate taper crimp die applies a tight bullet grip suited to semi-auto feeding.
• Steel construction these are not carbide dies.
• Black finish matches the look of a modern sporting rifle build.
• Sturdy clear-cover storage case the standard packaging across Lyman’s MSR Precision die line.

Frequently Asked Questions

Why does an MSR die set need a small base sizing die? Semi-auto actions need cases sized slightly smaller than bolt-action minimum spec to chamber reliably under spring pressure, which a small base die provides.

Is this a carbide die set? No, these are steel dies, not carbide.

Buy the Lyman MSR Precision 4-Die Set 450 Bushmaster

Order the Lyman MSR Precision 4-Die Set for .450 Bushmaster through our reloading dies lineup. Order it from our Lubbock, Texas gun shop for fast, insured shipping.