They seem to go one way or the other. Mine likes a PRB better. If I shoot from a bench rest it's almost as accurate as the Omega was.
GM is a 1-70 twist. It's a dream with a PRB, but too long to hunt with for me. I use it at the shoots. It's better than the Renegade barrel at longer distances, but not much to choose from up to 75 yds. They are pretty equal.
TC makes a good barrel.