What is the term for a cylindrical surface that measures the diameter of a projectile and can extend the full length of it?

The term that refers to a cylindrical surface that measures the diameter of a projectile and can extend the full length of it is specifically known as the "Bore". This term is commonly used in the context of firearms and ordnance to describe the internal diameter of a gun's barrel as well as the corresponding diameter of a projectile.

Understanding the bore is crucial in the study of munitions, as it directly affects the fitting of projectiles and the performance of a firearm. A precise bore measurement ensures proper projectile stability and accuracy upon firing, making this concept fundamental in the field of explosive ordnance disposal and firearms operation.

The other terms mentioned do not accurately describe this cylindrical surface related to projectiles. For example, "Baurrelet" is not a standard term associated with projectile dimensions, and "Cartridge" refers to the complete unit of ammunition, including the projectile, casing, powder, and primer, which does not focus specifically on the cylindrical surface. "Shank" typically refers to a specific part of the projectile or tool that may not extend the full length or relate directly to the bore itself.