Claybuster Harvester Muzzleloader 50 Caliber Crush Rib Muzzleloader Sabot Bullets Fits 44 Cal. Bullets 50 Bullets. Specifications for Claybuster Harvester Muzzleloader 50 Caliber Crush Rib Muzzleloader Sabot Bullets: Manufacturer: Claybuster Caliber: .50 BMG Projectile Caliber: .50 Caliber Quantity: 50 Bullet Quantity: 50 Bullet Package Contents: Claybuster Harvester Muzzleloader 50 Cal. Crush Rib Sabots Claybuster H15044GR: Harvester Muzzleloader 50 Caliber Crush Rib Muzzleloader Sabot Bullets Fits 44 Cal. Bullets 50 Bullets H15044GR