I would really like some input about selecting the right twist rate for a 450 marlin I'm having built. I have a P14 action that I want to have turned into a sporter. I believe Marlin uses a 1:20 twist rate for their lever action rifles in this cartridge. Is that the best twist rate for 350-400 grain bullets? <img src="/ubbthreads/images/graemlins/help.gif" alt="" />
