Remington Ultra HD, 410 Gauge, 3, 000 Buck, Buckshot,, 15 Round Box 20707 These rounds deliver dense, devastating patterns and massive knockdown power when the stakes are at their highest. Short-range patterns in smoothbore barrels are tight and effective for one-shot confidence. These 12-gauge loads include standard 9-pellets and managed recoil 8-pellets of 00 buckshot to maximum shotgun effectiveness.