The problem with building a 327 or any.other center fire on a rim fire frame is the firing pin location. I plan to build one at some.point myself. I will start with something like a model 14 frame and use a 22 cylinder. So me worry about lining a barrel for a.32 magnum. I will do it by threading a life of 312 barrel and making the original barrel into a shroud that fits over the large or insert in front of the frame