Anchor Tests
I have read most (if not all) the various tests done by Practical Sailor, Sail, and the 1995 Puget Sound Test (referenced above). All these tests conclude that no one anchor will work for all wind and wave conditions, bottom types, etc. Fortress and Danforth tend to test well in sand and mud. Plow types like the CQR, Spade, Delta Talon, etc. tend to do well in rocks and weeds. Since our local conditions usually involve 10-12 ft. diurnal tidal changes we frequently end up 180 degrees from where we first anchor so the ability of the anchor to resist pull-out when the current changes direction is important. Some anchors tend to pull out, but reset quickly (Bruce) whereas others tend to pull out not at all--just "corkscrew" into the bottom (Fortress). Our anchorages are frequently crowded so and anchor that does well at 3:1 scope is important. Based on all this we carry two anchors--a Fortress (aluminum Danforth type) and a Delta Talon (plow type). We have never dragged at anchor when these anchors are properly set. I am not saying that these are the best anchors for your neck of the woods; just that in Puget Sound they are an awesome combination. We have the best luck setting by first letting out 7:1 and backing down hard then reeling in to 5:1 or 3:1 depending on the crowd.