It's possible to get a bad barrel from any good barrel manufacturer. I have had really good luck with Krieger. They are cryo frozen and profiled before they are shipped. Single point cut. Big Country - if you got a lemon from Krieger, call them - odds are they will replace it. Hart and Liljaare also very good. I haven't gotten a good Shilen in about two years. Don't know what is going on there . . .

And there is a little knownbarrel maker, who shall remain nameless, that has a little one man shop in the mountains that I have gotten a few barrels from in the past year. The first one, after threading and chambering - and firing ten break in shot, shot a 1/4" group with the first five bullets that went through it