Ir refers to number of inches of length that it takes for the spiral line of the rifling to make one complete 360 degree turn.
The "rate of twist on rifling" is caliber specific. To give you an answer we would need to know which cartridge the rifle is chambered for.
Them twist rate of a Winchester model 70 rifle in .223 Rem.is 1"in 9".
The Springfield 1903 has a 1" in 10" twist rate. The later M1 service rifle also has a 1" in 10" twist rate.
More accurate than 90 percent of the people who will shoot it.
The Remington Model 66 is chambered for the .22 long rifle cartridge. The most common twist rate for the .22 long rifle is one full turn in sixteen inches (1:16).
The rate of twist for a Browning X-Bolt 24-inch barrel typically varies depending on the specific caliber of the rifle. For example, the .308 Winchester generally has a twist rate of 1:10 inches, while the .30-06 Springfield may also feature a 1:10 twist. Always refer to the manufacturer's specifications for the exact twist rate corresponding to your specific X-Bolt model and caliber.
The Browning 2007 Product Catalog states that the A-Boltchambered for 25WSSM with a 22" barrel has a 1 in 10" rate of twist.
"Twist rate" depends on a particular cartrige the barrel is chambered for. For example: A .30-06 would have a twist rate of one full turn in 10 inches. A .308 would use a twist rate of one full turn in 12 inches.
twist is 1:9
Depends on caliber. www.countrygunsmith.net
It should be Rate-of-Twist:1-in-12 if you have the 22in barrel Merry Christmas
Rifling imparts spin that stabilizes the projectile. The rate or "twist" determines how much