I'll add my 2 cents to saying your 7 will be fine. But....
Mr Murphy always seems to show up when you add firearms to airplanes and international travel. Ammo availability is always paramount to me should something happen en route. I have taken 30-06, 7 x 57, 7- 08, 416 Rem, 338 Win and a .270 on various trips for myself and my wife. Right gun right game no problem. Take your PH's advice on guns and optics. Some places you will need to make long shots, some places 100 yards will be "long". It's a big place. One thing I know is whatever your "list" includes you might want to consider taking two rifles just in case Mr Murphy arrives. Oh, and take the best animals your PH finds. Not everyone gets all their dream animals but don't let a great one that's not on your list walk. Such thinking always opens up a good excuse to go back again, and again, and again.
