Essentially the same
Inside the barrel.
An air RIFLE that shoots pellets through a rifled barrel will leave identifying marks on a fired pellet. A smoothbore air GUN that shoots BBs usually will not.
Grooves cut into the inside of a gun barrel for the purpose of spinning the bullet when fired.
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.
Button rifling is referring to how the barrel is manufactured, or actually how the rifling part of the manufacturing process is completed. With button rifling, a plug (called a button) is pulled through the hole in the barrel. If you want to learn more about different types of rifling, try this web page: http:/www.firearmsid.com/A_bulletIDrifling.htm A free floating barrel has to do with how the barrel is mounted on the gun. On a free floated barrel, the forend or stock does not come into contact with the barrel. The only place that the barrel will make contact with another part of the gun is where it is attached to the receiver. This type of system, as opposed to a system where the barrel makes contact with the stock, allows the barrel to flex, or to heat and cool more uniformly, allowing better accuracy in many cases.
Lands and grooves.