Accurate 4100 is a double-base, slow-burning spherical powder engineered for high-performance, full-power magnum handgun loads. Designed with exceptional metering characteristics, this powder ensures precise and consistent charges, making it a top choice for reloaders who demand uncompromising accuracy and performance. Ideally suited for .357 Mag, .41 Mag, .44 Mag, .454 Casull, .460 S&W and .500 S&W, Accurate 4100 delivers the velocity, power and reliability needed for both hunting and competitive shooting. Manufactured in Belgium to the highest quality standards, this powder provides smooth ignition, controlled burn rates and superior ballistic consistency-shot after shot. For reloaders looking to push the limits of magnum handgun performance, Accurate 4100 is the ultimate powder for delivering maximum power with precision metering and flawless reliability.