I've used 100gr Hornady SP's with mixed result. First one I shot had a .243 diameter entry and exit, no expansion at all. This being down the long axis of the yote, entering the chest and out just being the rib cage and hitting nothing "solid". I've also shot one broadside that had a nice little hole going in, and a hole nearly the size of my fist on the way out, must have hit something more solid that time (rib? I don't quite remember). Next up I'm going to try 75gr VMAX, but I'm not expecting spectacular performance when it comes to the pelt condition afterwards.