IMO, a gun based on an A&D action is fully qualified for a "best" rating. How could it not if its quality is of such a level it cannot be bettered. I think the term "best" has been terribly misused by the London trade as a marketing term for their products. Some have justified the label but others have been given it merely by the cachet of their name or location. Once again, this is merely the opinion of a country boy so it carries no learned weight.

When an old man dies a library burns to the ground. (Old African proverb)