I shoot the factory Knight sabots .50/260 in my mk-85

This one:



Does anyone know what actual bullet and sabot it is? Curious. Getting ready to do some shooting...I was thinking it would probably be alot cheaper to pick up bullets and sabots separately, than pay the factory price for a 20pack. (They don't seem to be readily available anymore for cheap like they used to ... #900183 is the factory knight part #)


Thanks