Quote Originally Posted by Joelski View Post
Mil-spec calls for button rifling. Most SPR and match grade barrels are cold hammer forged, which is arguably more accurate, and the most influential feature, next to floating.
I think you're a bit confused. Any of the well known match barrel makers like Shilen, Lilja, Bartlein, or PacNor do not use hammer forging.

There are only a few places in the US capable of making hammer forged barrels, like Daniel Defense and FN. DD actually does make an 18" SPR barrel that is stainless and hammer forged, but that's pretty rare. A hammer forged stainless barrel would probably still require a good bit of lapping/finishing before it was match grade in terms of accuracy, too.