For a single shot rifle fired once: slightly warm.
For a machine gun after a long burst: very hot (can even get so hot as to glow!)
The barrel moves when the weapon is fired.
it is very difficult considering the barrel could have been replaced but usely there is some wear on the inside
Grooves cut into the inside of a gun barrel for the purpose of spinning the bullet when fired.
The barrel of a firearm is the tube through which a bullet travels when a gun is fired.
The barrel is usually above the centerline of the gun. When fired, recoil pushes straight back from the line of the barrel, but that is offset above the centerline, and causes the gun to pivot.
the barrel is the part that the bullet travels through once the gun is fired. it is on the inside of the gun.
Yes, it is called "spiking", although it is likely to cause the barrel to explode if the gun (or artillery piece) is fired. YOU CANNOT PREVENT A GUN GOING OFF, BY INSERTING YOUR FINGER INTO THE BARREL
The muzzle is the opening at the end of the barrel where the bullet exits when fired.
No. They will be too large to fit in the gun or be fired out of the barrel.
science, Bullet markings and check them with the rifling of the firearm. Barrel twist and or markings can help ID the gun fired from. Nothing can tell you for sure, It can just tell you it was fired from a barrel like that of a type or make.
If a round is not fired and then ejected, nothing comes out of the barrel.
After it's been fired!