Ruffing patterns (select all that apply) refers to the grooves cut in a spiral down the barrel of a firearm. are unique patterns to each individual firearm will be the same inside two different barrels of the same firearm. allow bullets to be matched to the exact gun from which they were fired.

## Step 1<br />Rifling refers to the spiral grooves cut into the barrel of a firearm. This is done to impart a spin to the bullet as it is fired, which stabilizes its flight and improves accuracy.<br /><br />## Step 2<br />These rifling patterns are unique to each individual firearm. This is because the number, direction, and depth of the grooves can vary from one gun to another.<br /><br />## Step 3<br />The rifling patterns will not be the same inside two different barrels of the same firearm. This is because even though the firearm may be the same model, the rifling patterns can vary due to manufacturing variations.<br /><br />## Step 4<br />Rifling patterns allow bullets to be matched to the exact gun from which they were fired. This is because the unique rifling pattern of a gun can be used to match a bullet that has been fired from it.