Insure rifle is unloaded. You will need a cleaning rod, bit of masking tape, marker, ruler, and an oiled patch. Use tape to make a "flag" that wraps around the rod near the handle. Place oiled patch (large enough for snug fit) in the barrel, push down until tape is near muzzle. Note where tape is pointing. Mark rod with marker at muzzle. Withdraw rod, allowing it to rotate, until tape "flag' has rotated back to original direction, having made one full revolution. Mark rod again at muzzle. Measure between the two marks. If it took 12 inches of rod to turn one full revolution, that is a 1 in 12 twist- or one in 10, 1 in 6, etc. VERY slow twists for a muzzle loader may mean you use 180 degrees of rotation, and double the measurement (1 in 40, etc)
Rifling imparts spin that stabilizes the projectile. The rate or "twist" determines how much
In relation to firearms, it has to do with the rate of rifling in the barrel. Rifling is the spiral grooves that puts a spin on a bullet to increase it's accuracy. "Barrel twist" is the rate of spiraling or inches per turn. That is the length of barrel it takes to spin the bullet a full 360 degrees.
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.
According to Linda in the customer service department at Browning Winchester at (800) 945-5237 the 12 Ga models have a 1 in 28 twist rate.
By the twist rate, which is measured in the number of inches per full revolution. For instance, the old original Model 1894s in 30 W.C.F. were made with a rifling twist rate of 12:1. Or in more simple terms, the bullet turns one full revolution in each 12-inches of barrel travel.
1- 12 twist
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.
1/10
Most likely 1/14
The Browning 2007 Product Catalog states that the A-Boltchambered for 25WSSM with a 22" barrel has a 1 in 10" rate of twist.
if you mean the rate of twist, it should be one in 12 inches
"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.