You will need to call Browning.
You will need the assistance of a gunsmith to find out.
You will need to call Browning or take it to a gunsmith.
Depends on the 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.
Rate of twist on this model is 1 in 9 1/2"
Try the Browning customer service dept at link below
1 in 9
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.
It should be stamped on the barrel
Browning,s home page should contain this info.
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 this web site: www.exteriorballistics.com/reference/pdf/Twist%20Tables_Rifle.pdf It is one turn in 9"