What's the normal .318 twist? 10"?

In the .30/06, the standard 10" twist sometimes wouldn't stabilize the 250gr. old style Barnes copper tubed, pure lead cored bullets. Don't know about the Woodleigh's length in comparrison to the old sometimes finicky Barnes.

The 10" twist worked fine in .300 mags, though, due to the higher rotational speed with higher speeds.

The .330" bullet at 250gr. would stabilize easier due to it's shorter length from larger diameter, of course.