Barrel Contour
Also: Profile · Taper
The external profile and taper of a barrel, which sets its weight, stiffness, and heat capacity by deciding how much steel surrounds the bore.
Barrel contour describes the outside shape of the barrel, from the muzzle back to the receiver, and it determines how much steel surrounds the bore at every point along the length. Profiles run from light sporter tapers that keep a hunting rifle packable to heavy Palma, MTU, and straight bull barrel shapes that pile on mass for the bench and the prone line.
More steel means more stiffness, slower heating, and steadier point of impact across a long string, all of which help consistency. It also means more weight to carry and manage, so the contour is always a compromise. A fluted barrel splits the difference by cutting grooves to shed weight while keeping much of the rigidity, and the chosen contour feeds directly into the barrel’s harmonics.