Both of my 35 caliber rifles (Ruger #1 K1A Whelen and the 358-WSM Vanguard)are twisted 1 in 12" and running the 225 gr TSX and 250 gr Partition bullets with excellent accuracy.

Steelhead's advise about building your barrel length and contour to balance, is spot on.

"I'd rather have an Army of Asses led by a Lion, than an Army of Lions led by an Ass." (George Washington)