The older Stoner barrels were Liberty barrels and shot really well. I have one that’s a 20” with their SDMR profile. The ones made in the last couple of years are said to be made by Bear Creak Arsenal and it’s pretty hit and miss with them. I also have one of these BCA in a 20” 6.5G and it’s a copper mine. Not very accurate. I may waste time and money trying to break it in or just say screw it and buy a different 6.5G barrel. The easy button is to buy a barrel from a quality barrel maker. Sometimes the extra $100-$150 is worth it in components and time.
That's why a lot of guys say to spend the little extra on a good barrel. One from a reputable manufacture. You briefly talked about Liberty barrels. I have one and it seems to be pretty good. Doesn't copper foul like you say the BCA does. The BCA's are known to be hit and miss. From what I saw in the little bit of research I did on Liberty, there are a lot of guys saying they are good barrels. They are fairly inexpensive as well. The 6x45 20" stainless barrel cost all of about $250.00. Its a decent shooter, but not nearly as good as my Windham Weaponry barrels.
