I am currently running 72.5gr under a 160 accubond for 3042 fps with a WLRM primer with excellent accuracy. Looks like 108% with that based upon a previous QL request. If I can get in that range here. I’d be happy if the accuracy was good.
If those xpander Mz's are sabots, they aren't CO legal. My son uses 350gr fpb's and I'm using 300gr tipped Thor's. The No Excuses 460gr is one that I plan on trying next year if it will shoot well.