Looks like Swift has loaded ammo with the 300 gr A-Frame, In your situation and with Buffalo on the menu, I would be ordering a box of that. If it shoots and feeds well you are done and can stock up. Time is running short.
Just got back and shot my buff with 300 gr TSX. It worked great and I would use it again. And I already had about 400 of the 250 TTSX on hand. I felt better with a 300gr on buff, but that's just me. The GMX would not be on my list for a buffalo but would be great on the plains game. Since only a month to go I'd just go with a 300gr and use it on everything.
