Not to argue with myself, but I JUST remembered (I guess my memory banks have too many "cookies" in them) that a friend of mine in Austin that used to live down by Corpus, not that far from, shall we say, one of the biggest ranches in Texas. He did custom reloading back then, and one of his clients was one of the workers on that ranch. He would load up a couple hundred rounds of the good ole .240 Weatherby for this fellow every two years or so. It was this fellows "truck gun." And he said that "it kills all things on the ranch." And I do remember asking, "even nilgi," and my friend said that this fellow would have to go find wounded nilgi for clients, and finished them off with the .240. I certainly would assume premium hunting bullets were loaded. So, if this fellow trusted his .240, the .257 is a good bit more powerful than that. As the others said, it is all about proper bullet, and shot placement. MM