The Super Slims are heavier per inch of shaft than the A/C/C's and have a smaller diameter, in theory they should penetrate better than the A/C/C. They discontinued the A/C Kinetic, which I used to shoot so I tried a dozen of the Super Slims to find that my finished arrow was within 5 grains of what the Kinetics are. I'm very happy with them so far. Maybe I should go back and shoot another reindeer with one of my old A/C/C's to see if it goes completely through, 15' beyond the animal and buries half the shaft length in the tundra after a 40 yd. quartering away shot that cut a rib in two on entry like the Super Slim did, just for purely scientific curiousity of course...