what is a bull barrel
A bull barrel is a type of gun barrel that does not taper outward, making it completely cylindrical. This makes the barrel stiffer, which reduces the amplitude of the vibrations in the barrel created by by the sudden increase of air pressure in the chamber when the gun goes off.The point of the bull barrel is to reduce the negative effect these vibrations have on aim.or pistols like the Ruger MK III and other small guns that use bull barrels, the vibration-dampening effect is less important, if it factors in at all. In guns with shorter muzzles like pistols, the bullet doesn't spend enough time traveling through the the barrel for it to be overly affected by the vibration.