BudsGunShop.com - Barrel twist

Jose - this rifle barrel features a 1:9 twist rate. Better with lighter bullet weights, such as the 55 gr or 62 grain.

Jose, Barrel twist is the rifling in the barrel. Twist rate refers to the rate of spin in the rifle barrel, and is represented in inches per turn. It's important that your barrel has an adequate twist rate to stabilize the bullets you're shooting. A barrel that is a 1:10” twist means that the rifling will spin the bullet one revolution in 10 inches.

Barrel twist is the rifling in the barrel.