Terminology: Lands and Grooves

by
posted on April 3, 2013
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
wiley-clapp.jpg

Take a close look at your handgun barrel the next time you are cleaning it. Since we never clean loaded gun, it will have been carefully unloaded and the ammunition put away. As you check the bore to be sure you have done a proper job of removing the debris, take note of its spiral grooves. They weren’t always there.

These grooves were pressed, cut or hammered into place when the barrel was a smooth tube. This process is known as rifling the barrel and the end result is also called rifling, so the word is both a verb and a noun. Rifling induces a spinning motion to the bullet as it makes its speedy way down the barrel.

In the manufacturing process, the tool that creates the rifling puts (usually) five or six grooves into the smooth tube. The parts of the barrel that aren’t touched by the rifling tool are called lands. Therefore lands and grooves equal rifling, which spins projectiles and increases accuracy.

Latest

Sight Alignment
Sight Alignment

Sighted Fire vs. Point-Shooting

A long-standing argument among handgunners revolves around the concept of sighted fire versus point-shooting. A more productive approach is to understand the problem each is trying to solve.

Derya Expands TM22 Family with Timekeeper & Pump Models

Derya continues the expansion of its rimfire line with two new models for 2026, an update of the original semi-auto TM22 and a new pump-action version.

Gun of the Week: Taurus RPC

The Taurus RPC is a welcome addition to the growing marketplace of PDWs, or personal defense weapons, a concept that pairs pistol-caliber cartridges with larger-format firearms.

The Armed Citizen® Nov. 13, 2026

Read today's "The Armed Citizen" entry for real stories of law-abiding citizens, past and present, who used their firearms to save lives.

Review: Kimber 2K11 Pro Comp

Kimber expanded its 2K11 line with the Pro Comp in 2026, providing a Commander-length slide and barrel topped by an integrated compensator.

New for 2026: Bear Creek Arsenal Bear Bolt Pro

North Carolina-based Bear Creek Arsenal, a prolific maker of AR-10 and AR-15 pattern firearms, is combining the modularity of the MSR platform with a traditional turn-bolt action with its Bear Bolt Pro.

Interests



Get the best of American Rifleman delivered to your inbox.