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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.
You will need to call Browning.
You will need to call Browning or take it to a gunsmith.
The Springfield 1903 has a 1" in 10" twist rate. The later M1 service rifle also has a 1" in 10" twist rate.
Depends on the caliber.
fine twist london
Try the Browning customer service dept at link below
The Browning 2007 Product Catalog states that the A-Boltchambered for 25WSSM with a 22" barrel has a 1 in 10" rate of twist.
You could contact Browning at Browning.com and ask.
1 in 9
You need to see a gunsmith.
Rate of twist on this model is 1 in 9 1/2"