Product Overview and Introduction

Achieve dependable ignition, consistent velocity, and exceptional accuracy across a wide range of popular rifle calibers with IMR 4320 Smokeless Powder. As a trusted, medium-burning extruded (stick) propellant, IMR 4320 has long been a staple in the reloading community, celebrated for its versatility and smooth pressure generation across medium-capacity rifle cartridge cases.

Whether you are handloading precision varmint rounds for the .223 Remington, crafting mid-range target loads for the .308 Winchester, developing hunting ammunition for the .243 Winchester, or reloading classic cartridges like the .30-06 Springfield and .250 Savage, IMR 4320 delivers the predictable ballistics and tight group sizes required by experienced handloaders.

Versatile Performance and Precision Extruded Quality

Built to stringent chemical and physical manufacturing standards, IMR 4320 offers distinct advantages on the reloading bench:

• Medium Burning Rate: Perfectly positioned for a wide array of standard rifle cases, ensuring optimal velocity and complete powder combustion.

• Extruded Stick Uniformity: Precision-cut grains meter consistently through volumetric powder measures and drop tubes to keep charge weight variances to a minimum.

• Clean-Burning Formulation: Designed to minimize barrel fouling and residue buildup, helping maintain accuracy throughout extended shooting sessions.

• Versatile Caliber Range: Excels across a diverse mix of vintage military cartridges, modern sporting arms, and traditional big-game calibers.

The Professional Choice for Versatile Rifle Reloading

When your reloading bench requires a dependable, historically proven propellant that bridges the gap between fast and slow-burning rifle powders for popular calibers like .223 Remington and .308 Winchester, IMR 4320 Smokeless Powder stands out as a reliable essential for your powder locker.

Key Features and Benefits

• Wide Caliber Compatibility: Exceptional performance in .223 Remington, .308 Winchester, .243 Winchester, .30-06 Springfield, and .270 Winchester.

• Consistent Velocity Spreads: Formulated to deliver low standard deviations for improved downrange accuracy.

• Quality Assurance: Extensively laboratory tested for lot-to-lot burning rate consistency and long-term shelf stability.

• Available Packaging: Offered in standard 1-pound containers and economical 8-pound bulk jugs.

Specifications

• Product Type: Smokeless Powder (Extruded / Stick)

• Brand: IMR

• Powder Family: IMR 4320

• Burning Rate: Medium

• Primary Applications: .223 Remington, .308 Winchester, .243 Winchester, .30-06 Springfield, and General Rifle Cartridges

• Packaging Options: 1 lb Canister / 8 lb Bulk Jug

• Storage Requirement: Store in a cool, dry place away from heat, sparks, open flames, and direct sunlight