I think every barrel benefits from being bedded and floated. If done correctly, it cannot hurt anything. You're truly looking for consistency shot after shot, and when the barrel whip can allow the barrel to make contact with the stock differentially from one shot to the next, it can be inconsistent.
Weatherby claims that they intentionally don't float their barrels smaller than #3 contour from the factory because they say that their #2 and #1 barrels benefit from stock contact. I've floated several of them over the years, and they all shot more consistently afterwards, even if the improvement was only marginal.