I know this got glossed over, but this dude has probably chambered more barrels from more manufactures than just about anyone out there, while also being one of if not biggest rifle barrel sellers out there. He is also one of the few smiths I would trust to make a barrel for me, as I have never heard a bad thing about bugholes/ SPR in over a decade. If this is what Greg thinks, its probably not far from the truth.20 cal: Mullerworks
22RF: Muller, Shilen
224: Muller, Bartlein, Shilen
6mm: Bartlein, Krieger, Brux, Muller, Hawk Hill
6.5mm: Muller, Brux, Bartlein, Krieger, old Rock Creek
7mm: old Broughton, Brux, Bartlein, Krieger
30: Bartlein, old Rock Creek, Brux
338: Bartlein, old Rock Creek