A cartridge assembly for military and police training meets the requirement of practicing vividly while causing no harm. The assembly mainly has a projectile, a sabot, a C-type ring, and a cartridge case, wherein the projectile is disposed in a recess of the sabot; the sabot is fitted tightly into the case and the C-type ring is disposed in a slot at the bottom of the sabot. Upon a primer being struck to ignite the powder, the expanding gas partially outbursts and bleeds through an orifice to pr...