DetailsIMR Hi-Skor 800-X burns slower than 700-X and was developed to be as elastic as possible. Many small gauge, target and 12ga field load. This powder is also used in heavier handgun loads. This large-grained flake powder is at its best when used in heavy field loads from 10 gauge to 28 gauge. In handgun cartridges 800-X performs superbly in cartridges like the 10mm auto and 44 Remington Magnum. Excellent velocity and uniformity translate into top accuracy.