In most cases blaster bolts move slower than bullets. Most firearms generally fire a round at about 720mph. The speed of sound is 762mph (roughly). So in actuality the sound of the shot firing reaches you an instant before the bullet does. There are weapons that fire at faster than sound though. We have high caliber rifles that can fire bullets at super-sonic speed, roughly between 900-1300mph, a bit shy of mach 2. Then we have Rail Guns which can fire projectiles around Mach 7. But those're big, Naval Ship mounted guns.(Modern Ships) A blaster is not a laser so it does not go very fast (speed of light), instead they fire a bolt of focused high energy particle beam. A common blaster is plasma based. meaning it fired a superheated, ionized gas.