Speaking from experience I personally like the dovetail method for under barrel lugs. In my opinion they're very strong. I recently took a 42 inch long .45 caliber straight barrel out of a rifle I built years ago, before I knew any better, I had used the staples for the under lugs. Imagine my surprise when I punched out the pins, lifted out the barrel, and found NONE of the three staples I used still attached to the barrel!!! All three were laying in their slots in the bottom of the barrel channel!! I suppose only my barrel's tang bolt and a little snugness between the barrel's side flats and the wood was all that was holding that barrel in!! It's hard to beat a tight fitting dovetail...let alone a peened dovetail to boot.
