I shoot the 300gr XTPMags as my baseline bullet out of my Knight. Loaded over 80gr of 2fg 777, they give me EXCELLENT accuracy out to 100 yds with a muzzle velocity of 1500fps, with 1500ft lbs of muzzle energy.
I too have never hunted with them, butI wouldn't hesitate to if need be.

The good thing about these is that you can save $$$ bybuying in bulk by ordering the bullets and sabots seperately in boxes of 50 from reloading supply places.