What's the best bullet for sheep, deer and the occasional elk. I shoot 180 GrandSlams currently at 3000fps est(80gr of 7828, cci 250) out of a 24 inch tube(1 in 12" twist). I was considering 165 or 180 Scirrocco, are they worth the extra cost? I Hit a deer at 500+ yards with 180GS barely dented the first half of the jacket, went right thru one shoulder, deer went down after 20 yards, should I be going to something a little softer, lighter, faster?.