The twist rate in a Winchester 670, 243 caliber is 1:10.
twist is 1:9
1/10
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.
9.5
1 in 9"
The answer to this q? is 1-9"
1-10
1 in 10
The answer is 1:10
1-12"
Rate of twist on this model is 1 in 9 1/2"