Smokeless powder for .410 shotshell. Alliant Powder's new 410 is the only flake powder that is specifically designed for the exacting needs of .410 skeet and field loads. It's the cleanest burning .410 powder available. New 410 is more efficient, with lower powder charge weights, giving it optimum loading characteristics. The superior ballistic performance of 410 creates perfect patterns. Consistent performance in any weather, shot after shot, lot after lot, makes the new 410 your reloading powder of choice. Clean burning, Optimum loading characteristics, Superior performance. Principal Purpose-.410 Target Shotshell. Remarks-New! Especially designed for .410 Skeet Loads. Clean burning and charge efficient.