For plains game I would take aRem 700, 300 ultra.Its a bittoo large for duikers, and impala's etc.But, its also a bit small for an eland. It would handle the long rangesoften needed to harvest a gemsbok.All in all I think its a good compromise.
I have been researching this for about a year and have almost decided to do it this summer ..have to wait and see what the taxman and company bonus come my way. 2 outfitters I have spoken to 1 uses a 300 win mag and the other uses a 300 wsm. no 2 has a photo album and one picture of a very dead lion killed with a 300 wsm Winchester 70 classic. Consult someone over at AR or the outfitter in question. I would imagine most hunters over there would just be thrilled with a Client showing up with a Rem 700 in 300 ultra.