Isn't the 673 an updated version of the old 660's? If so, it ought to shoot well. I always liked the look of that rifle, although I preferred it without the vent rib. Never had the opportunity to shoot one. I don't know if I'd have chosen the 6.5 Magnum. As popeye said, I don't think that I've ever seen a box of the stuff on the shelves, although most of my shopping is at Academy.... I'd imagine the stuff commands a premium price.