Unless you spin your own barrels, not a good idea. I bought like SN: 26 or 27 not knowing any better last year and ran into some troubles getting prefits to actually head space. Impact did not guarantee headspace until after 150. Called up impact and they exchanged it for 7 thousand something SN but headspaces without any issues. Im not that patient enough to wait on a gunsmith for 6 months at a time to fit to that specific action. Also if your stock is bedded for a "current" action, it may or may not fit. Just a heads up if you dont know.