I'm wanting to build a model 12 in .223 to a .308 or 300WSM? and have a few questions. First, can I do a 300WSM on the model 12 SA with a small shank? ( if-so, good or bad idea?) Besides the barrel, is all I need,a new bolt head? I'm planning on getting a Shilen barrel, a XLR stock and would like to get a fluted bolt and a tactical bolt handle. Does anyone know where I can get a fluted bolt? Where to buy the bolt head and handle? Thanks in advanced, I know somebody will help me.