Dead Center Duplex Bullets - Flat Rate Shipping* Duplex Dead Center Bullet - Shoots a .357 caliber Dead Center bullet from your 50 caliber muzzle loader. A seemingly crazy idea that seats a high BC .357 caliber Dead Center bullet into a sabot-within-a-sabot. Available in 175 and 195 grain bullet weights, these lighter bullets shoot at velocities in excess of 2100 fps with 100-120 gr of Triple 7. Aim dead-on out to 200 yards, and hit fine at 250-300 yds with a slight hold over. This is the bullet to choose when hunting open country and using a telescopic sight. *Flat Rate Bullets Only Shipping Terms: A USPS promotional FLAT CHARGE for bullets only orders. Maximum 15 lbs mix and match per shipment. Out-of-stock and partially out-of-stock orders will be back-ordered, held, and shipped all together in one shipment as soon as we are re-stocked. (Split Ship of partial back orders is available per shipment). Bullets Only - No loaded ammo or other items - More Info at our Flat Rate Bullets Page. Choose "$10 Bullets Only Shipping" at Checkout.