Cmarti,
I was like you last year, looking for a replacement for the powerbelts. In case you haven't seen them, the sabertooths sit on a short sabot and are not attached like powerbelts are by a post to the sabot. The hollowpoint is serrated also unlike the powerbelts. I haven't recovered any to see how they expand, but as I said above the big half-dollar size holes speak for themselves. Hope you like them.