I have read several articles about the subject matter above. It appears that the heavier barrels are all free-floating. However, there also seems to be some discussion on where the line is drawn on lighter barrels and whether free-floating is better than up-pressure on the barrel.

Any rule of thumb too follow besides just shooting? I'm thinking of purchasing a rifle that has a lighter barrel that's not free floated but has the action glass bedded recoil lug. I like the lighter rifles but don't want to sacrifice accuracy.