How to Load a Marksman Repeater Air Pistol. The Marksman 1010C BB Repeater Air Pistol can shoot BBs, pellets, bolts or darts at a velocity of 200 feet per second. You'll need to cock the gun and release the loading port in the barrel to insert BBs or other ammo into the gun. You'll then be able to load up to 18 BBs or a single pellet, bolt or dart.