I'm hoping to order my 280A.I. barrel from McGowan for my Rem-Age build. I already know what length, profile, twist rate, etc I need/want. What I'm still a bit murky on is stuff like throat length and other more technical items. I hear many of you talking about having long throats, short throats, tight chamber dimensions, etc. I know many, when they have their barrels installed, will bring their gunsmith an inert round they can use to ensure proper fitment but what if I don't have any rounds because I've never had a 280A.I. before? I don't want to just load a dummy round up off a wild guess of what I'll be needing. What are the questions I need to be asking myself, McGowan, or my gunsmith before I order my barrel?