Sabots are very legal to hunt with. I have ran into many people that think they are not but they are.

per the regs: for big game a single non-jacketed lead projectile of nominal 50 caliber or larger, or fire a single non-jacketed lead projectile of atleast 170grains.

They put the atleast 170 grain lead projectile in there to alow Sabots. Basicly they dont want you shooting any other big game than deer with a rounball so thats where the 170grains comes in.