Introducing the Vectan ST3XL Smokeless Gun Powder, the ST3XL is an extra-slow-burning smokeless powder engineered for the heaviest shotshell and specialty magnum loads. Its progressive, ultra-slow burn rate delivers maximum velocity potential and stable pressures, making it the choice for pushing heavy payloads. With dependable ignition and consistent performance across temperature extremes, ST3XL gives reloaders the confidence they need in demanding field and hunting applications. FeaturesUltra-slow burn for maximum velocity and heavy magnum loadsClean-burning formulation with reduced foulingConsistent performance in all weather conditionsOptimized for high-capacity and long-range loads Note: ST3XL shares performance similarities with very slow-burn powders in the same class, but it is not a direct substitute for any other propellant. Always consult published load data before use. Warning About Smokeless Powder:Do not exceed the loads displayed in the reloaders guideNever mix any ...