The barrel nut system works, but takes too long and you have to recheck headspace each time. With actions such as Bighorns TL3 and Origin, Defiance Ruckus, Impact 737, and a couple others- you can buy shouldered prefits. These actions have no “minimum/maximum” slop like a factory action. They are built to an exact specification. The barrel makers (like Proof Research) have the exact action dimensions provided by the action mfg. They then make barrels to that exact spec. This system is perfect. For example: both my hunting buddy and I both have Origin short actions. I had a 6.5 PRC Proof CF barrel that would shoot 0.3 MOA groups. I took the barrel off my action, torqued to spec on my friend’s action. Results: same 0.3 MOA groups with the same ammo. No need to check headspace. You can if it makes you feel better. I did myself with the first couple Proof barrels. I would not, and can not recommend a factory action or rifle anymore.