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
It should be stamped on the barrel
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"
Browning,s home page should contain this info.
Please go to Customer service at Browning.com