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Alliant Herco Smokeless Gun Powder

Clear Product Overview

Alliant Herco Smokeless Gun Powder is a versatile, double-base coarse flake powder formulated specifically for heavy shotgun loads and high-velocity handgun cartridges. Long recognized as a staple on handloading benches, Herco burns slightly slower than Alliant Unique, making it an ideal choice for heavy 12, 16, 20, and 28-gauge field and target shotshells. Additionally, its burn rate characteristics deliver excellent performance and consistent velocities in high-pressure handgun cartridges such as 9mm Luger, .357 Magnum, .40 S&W, and .45 ACP.

Relevant Specifications

• Brand: Alliant Powder

• Product Line: Smokeless Propellants

• Powder Name: Herco

• Powder Type: Double-Base Flake Powder

• Burn Rate: Medium-Fast (Slightly slower than Alliant Unique)

• Primary Applications: Heavy Shotshell (12 GA, 16 GA, 20 GA, 28 GA) and Handgun Reloading

• Available Sizes: 1 lb Canister & 8 lb Keg Options

• Country of Origin: Made in the USA

Real-World Use Information

Handloaders favor Alliant Herco for its ability to generate high velocities in heavy payload shotshells without exceeding safe chamber pressures. Its coarse flake structure meters predictably in standard powder measures and progressive reloading presses. When loading magnum handgun rounds or heavy field shotgun shells, Herco provides uniform ignition, clean burning, and consistent shot patterns or group sizes across variable ambient temperatures.

Compatibility & Requirements

• Application Compatibility: Suitable for heavy 12-gauge magnum loads, 16-gauge, 20-gauge, 28-gauge field loads, and popular centerfire handgun cartridges.

• Load Data Requirement: Always consult official Alliant Powder reloading manuals or manufacturer data tables for precise charge weights, primer selection, and wad specifications before charging cases or shells.

• Storage Requirement: Store in its original container in a cool, dry place away from heat sources, sparks, and open flames.

Pros & Limitations

Pros:

• Versatile Performance: Ideal for both heavy shotshell payloads and high-velocity handgun loads.

• Consistent Burn Rate: Slightly slower burn rate than Unique allows for higher energy output at safe pressures.

• Proven Track Record: Decades of trusted performance among competitive shooters and hunters.

• Clean Burning: Leaves minimal unburnt residue in barrels and choke tubes when loaded to proper pressure ranges.

Limitations:

• Coarse Flake Geometry: Requires careful metering calibration on small-capacity handgun powder measures.

• Not for Rifle Use: Unsuitable for centerfire rifle applications due to its fast burn rate profile.

Frequently Asked Questions (FAQs)

Q: How does Alliant Herco differ from Alliant Unique?

A: Herco burns slightly slower than Unique, making it better suited for heavier shotshell payloads (such as 1-1/4 oz 12-gauge loads) and higher-velocity handgun loadings.

Q: Is Alliant Herco suitable for 20-gauge shotgun reloading?

A: Yes! Herco is widely used for heavy 20-gauge field and target loads, offering excellent velocity and pattern density.

Q: Can I use Herco in 9mm or .45 ACP handgun loads?

A: Yes, Herco performs very well in centerfire pistol cartridges including 9mm, .357 Magnum, .40 S&W, and .45 ACP when loaded according to published reload data.

Shipping & Delivery Information

• HazMat Requirement: Requires Federal HazMat shipping certification; HazMat fee applies per shipment.

• Shipping Method: Ships via certified ground freight across the Continental United States.

• Restrictions: Cannot ship via air freight, P.O. Boxes, APO/FPO addresses, or international destinations. Age verification required at checkout.

• Return Policy: Due to safety regulations governing hazardous propellants, all powder sales are final.