Grooves cut into the inside of a gun barrel for the purpose of spinning the bullet when fired.
Inside the barrel.
Essentially the same
because the rifling in the barrel makes it go straight.
You compare the rifling marks on the bullet to the rifling in the barrel. You can also compare the firing pin mark on the primer to the firing pin on the gun.
The twist on the inside of a gun-barrel is called rifling. I dont know the specific pitch of the rifling in this particular gun but thought you would like to know the proper terminology.
Rifling a gun barrel causes the bullet to spin when it comes out. This makes the bullet fly more straight and greatly improves accuracy. Much like a spinning football spirals.
broach is the tool to cut rifling.
It is a gun barrel where the rifling was produced by a method that did not force the inner layer of of the barrel beyond it's elastic limit.
a slug is normally use in a shot gun and they are not rifled a gun with a rifled barrel should shoot a Shell that is the same caliber as the gun.
Bullets spin when fired from a gun due to the rifling inside the barrel. Rifling consists of grooves that twist around the inside of the barrel, causing the bullet to spin as it travels down the barrel. This spinning motion stabilizes the bullet's flight and improves accuracy.
It causes the bullet to spin which makes it go straighter.
Grooves on inside of the barrel= a RIFLED firearm- the grooves are known as rifling. Grooves on the outside of the barrel= fluting, done to reduce weight