I am surprised no one has used these.
When I had my ML barrel installed several years ago, I didn;t want to pay $1 a piece for powerbelts or similar bullets. I had heard good things about the then new "crush rib sabots" from Harvester so I decided to try them with their 260gr Scorpion Funnel Point bullets (Still about $12 for a 30 pack of bullet/sabot).
I found them to be accurate,easy to load and knocked a deer in the dirt, so I have never tried anything else.
I have heard a lot of bad reports on the Powerbelt performance on a popular local hunting forum I read often.
I would not be afraid to try the Harvester Saber Tooth's if I was wanting a new bullet. I see them listed now as "claybuster Harvester", I don't know if they changed hands or names or whatever.
Midsouth usually has the best prices on them.
Good luck!