Not going to see much of a gain by switching food, Jerked Beef is a 7% buff, so you're only going to see +42.56 attack. If you're already at the str cap I guess might as well swap foods, just not really going to see a noticeable difference until att gets closer to the 650-700 range pre-food. To get the full benefit of jerked beef, base attack needs to be 728+