Black High Pressure Muzzleloader Sabots for muzzleloader bullets are designed and manufactured to enhance accuracy with hot powder charges. In .50 caliber rifles and charges exceeding 100 grains of Black powder or equivalent of Pyrodex or the higher or hotter powder charges. Try this sabot with your muzzle loader bullet for increased accuracy. Knight Sabos increase velocity, energy, and shock effect - making your Muzzle-loader a much more effective and versatile firearm. Thousands of experienced blackpowder hunters agree that, with proper bullet selection, Knight Sabots offer controlled expansion and penetration and possess outstanding shock potential. 50 Caliber Bullet Size .451-.452 (.45 Caliber) Bullet Grains: 240 - 350 High Pressure Sabots Black 50 pack