why "think" .40 short and weak, 180 grs 950fps, amounts to a hoot? Considerably smaller in diameter, less likely to expand, and a tad lighter, so it won't even be AS effective as the .45 jhp is. Hell, 200 gr .45 jhp, at 1000 fps is nothing much, really, and animal testing will prove it. Sometimes it expands really well in flesh, sometimes it doesn't. the diameter of the .45 hp's cavity is larger than that for the .40, so it's more likely to expand than the .40 is, at the same speed.