Make sure your rifle is transported in a sturdy case, the handling in transit by airport staff is notorious for not being gentle. A soft case or gun slip is good to have when transporting your rifle on the hunting vehicle.
Rifles for plains game
Shots can range anything from 20 to 300yards. A 300 caliber rifle comes recommended. You would encounter areas with thick brush so rather go for a heavier grain bullet. A 1-6*40 telescope will work well in most situations. If you hunt leopard or bush pig an illuminated reticle would be a great help. Invest in quality ammunition, premium soft bonded bullets like Trophy Bonded, Barnes X ,or Nosler Partition all comes highly recommended. There is no substitute for shot placement. The best rifle to have is the one you know and shoot well. African animals anatomy varies from most North American game. On arrival you will receive a Cheetah Safari Shot Placement book illustrating the vitals of African Game.
A 375 H&H is the minimum requirement to hunt dangerous game. Saying that, it is more than adequate to deal with any of the dangerous seven. The best rifle to have is the one you shoot well, don’t buy a big caliber and depend on a big bullet to put an animal down. Shot placement is the key to a successful hunt. Rather shoot a smaller caliber and shoot it well. When you are hunting dangerous game make sure your equipment are trusted and tested, Telescopes with a low magnification works best and an illuminated reticle helps a lot under low light conditions. Shoot the best premium bullets that you can find. Soft Bonded core bullets like Barnes X and Trophy Bonded are tested are great for first shots. A quality Solid is good to have as second choice and back up.