Going on a buffalo hunt in late Oct. From what info I can get the classic heart long shot is the easiest but the head shot will drop them in there tracks. My question is, what bullet to use in my 8MM Mauser 175gr. sp or 220gr. sp . The 220 is a pretty hard round and I found out to my chagrin that they aren't too good on whitetail, they blow through like a FMJ and left me with a long blood trail to follow. Anyone ever take a buffalo with the head shot? The ranch owner says to put one in the ear or just behind the ear so as not to loase any meat. I should get around 2400 fps in the 220 and 2700 fps in the 175 . Any thoughts on which to use?