I'm in the beginning stages of setting up a suppressed Tikka 300 WSM with a 1-11" twist barrel. My question/concern is what length to shorten the barrel to (I have another factory barrel I will leave full length if something goes awry). I've read that a bullet needs two full revolutions to stabilize properly meaning a 1-11" twist would need a 22" barrel, I'd like to go in the 18"-20" neighborhood. Any solid input is greatly appreciated.