Using your logic, a .308" 220g bullet is "not the best for hunting" either. Very few people choose them because they are slow (around 2500fps), generate a lot of recoil (about 25 ft-lbs) and have a B.C. about that of a cement block.
The BC of 220 class bullets is the reason people use them; the Berger 215 is .696, the Lapua 220 is .647, hardly cement block territory. The Berger 230 goes .743.
