I´m about to start cutting a 30-378 chamber in my barrel. I´ve been hesitating for a while, but time has come to get this project started. It will have 32-34 inches of usable bore and 1/8 turns per inch, 1,5" dia. Does anyone here have information and or knowledge on 30-378 that could be helpful to me before cutting it? Are there variations of 30-378 that are being used, if so...pros and cons? I would really appreciate any help on this matter. Thanks.