sabotloader - no, I have a New Frontier Beartooth purchased from Cabela's. The manual recommended PowerBelts, but I tried some other combo's before finally buying PB's. I could not believe the difference in loading them! Some of the other bullet/sabot combos had to be literally pounded down the barrel, and the PB's started with thumb pressure (no starter) and then just nicely slid down with enough pressure to make me feel sure that they wouldn't come off the load easily. I've heard some guys say they almost fall out the barrel, and I believe it.
I get good accuracy with them at 100 yds - the only thing is the negative press I hear about them coming apart. If those Crush Rib sabots and a XTP would load with moderate ease, I'd probably give them a try.
Actually, I have a box of 300 gr XTP's, and gave them to a guy who has a NEF Hunter (I think it's called). He gave them back saying he couldn't load them either.

IM Jaybe