Im planning my first trip to Afrika for 2012. It will be primarily Plains game but Id like to add Leopard or possibly Buffalo. I have a SxS 9.3x74R, but Im concerned it may not be appropriate for some longer shots on Plains game. As I have some time Im thinking about picking up another rifle. My first choice would be a Ruger No1 in 30-06 or perhaps a bolt action in the same caliber. Many many questions..... Do I need a longer reaching gun caliber than the SxS 9.3x74R? Would a scoped No1 in 9.3x74R work for the longer shots, allowing me to simplify the ammo supply? Is a 30-06 sufficient for Plains game? Will a single shot that I have experience and I am comfortable using be alright? If a bolt action is a "better" idea can I use a 20" barrel 30-06 (Ruger International)?