It depends on the manufacturer and their level of QC. A manufacturer can choose to make a lot of barrels really cheap and really fast, or do it right and make really good barrels.
Domestic manufacturers seem to favor hammer forging because it allows them to produce cheaper barrels to help ther bottom line, not necessarily better barrels. A Tikka or Sako barrel is also hammer forged and is of much higher quality than the Remington or Ruger barrels. I've often heard it said that a Remington will shot close to moa with good handloads, and a Tikka will shoot tat well with off the shelf factory loads- from what I've seen and shot from the two manufacturers, in my opinion this assessment ispretty much true. Remington selling their rifles on the virtue that their barrels are hammer forged would be like a pistol manufacturer selling pistols on the virtue of having lots of MIM parts.