absolutely anything that will fit in a AR-15 mag can be had, my 2 faves for hunting are the 25 wssm and the 458 socom, but for hogs, could you beat the 6.5 grendel, the 6.8 spc, or the 350 legend?
don't blame him one bit if he has the means to buy them! elkman, the 350 legend is a strait walled 223 case necked to .358.