BR is 47 ft, 24 tons. The original equipment was a 35 kg CQR that we used for several years in New England waters with only one dragging incident (oyster shells on the bottom). Switched to the 30 kg Bruce when we went into the tropics, as it was said to have better holding in sand over coral (?Who knows?). Have used it ever since and have not had a problem with it -- a couple of times we needed to try for a better set, but once its in, we've never had it come out until we broke it out. (No doubt, some of our good fortune is due to the 1/2" chain the hook is attached to.)
There may be better anchors out there, but the only trouble with trying them is they're so damn expensive!