I have both. I can tell you a lightweight 280 AI shooting full power 160/175 gr loads is no cupcake. I've had both in a Kimber MT and the 30-06 recoiled more than the 280 in equal rate rifles but not by much. My current Kimber 280 AI does 3000 with a 160 and weighs 7lb 1 oz. It's not a cupcake to shoot. It's very tolerable but will definitely give you a magnum eyebrow if you crawl the stock or shoot from a weird position.
