Alliant Herco In Stock Overview

Every container of Alliant Smokeless Powder backed by a century of manufacturing experience and the most exacting quality control procedures in the industry. Chemical composition, grain shape and size, and overall density constantly checked and tested in a ballistics lab to ensure consistency.

Used in shotshell loads since the 1920s, Herco smokeless powder is an excellent high base hunting load ideal for upland game and magnum handgun loads. Can be used in 10, 12, 16, 20 and 28 gauge target loads.

Warnings from the Alliant Herco Manufacturer:

Do not exceed the loads displayed in the reloaders guide.
Never mix any two powders regardless of type, brand, or source.
Never substitute any smokeless powder for Black Powder or any Black Powder substitute.

What’s the deal with Herco in 357 Magnum?

What’s the deal with Herco in .357 magnum? In Lyman’s old manual (44th ed.), there are several loads for Herco in .357 that use pretty large amounts of powder, even some compressed loads. For example, a number of CB loads in the old Lyman manual show max loads of Herco of over 11 gr for bullets from 121-158 gr (p117 of the 44th ed.)