The TC Flex Tec stocks IMO do reduce some felt recoil. There is really no need to shoot magnum loads in that barrel. 100gr of BH209 with a 200gr SST or Barnes 195 MZ will shoot excellent stuffed in a Harvester smooth sabot.
.38 caliber or larger in Ohio is legal for hunting with a Muzzleloader.
Nice choice Chaded!! You will be very happy once you hit the range.