Where target shooting accuracy is the prime consideration, some bullets such as the Sierra "Matchking" incorporate a cavity in the nose section. This has the effect of lightening the bullet's forward section and shifting the center of mass towards the tail of the bullet, to give an improved ballistic coefficient, greater down-range velocity retention, and greater resistance to deflection by crosswinds. The manufacturing process of hollow-point bullets also produces a flat, uniformly-shaped base on the bullet which increases accuracy by providing a more consistent piston surface for the expanding gases of the cartridge.