My current battery is'nt maybe the perfect one but I do get by with it.I have a .243 .308 .303 .460 and a 12g shotgun.Basically I hunt exclusively with my .243. I have shot basically everything from Steenbok to Eland with it and it served me well for 20years now.Taking in consideration that your bullet placement is up to scratch and you use good quality ammo then there is no plains game that you cannot hunt with a .243.ALso keep in mind that any rifle has its limitations and you wont try an eland or a gemsbok on the shoulder with a 243 at 300yds.That is just plain stupid but you can shoot springbok or blesbok at 400yds on the shoulders with good results.Last year my wife shot a blackwildebeest at about 150m with my .243 and it was flat on it back instantly.I had the 308 with me as well but she felt more cumfortable with the 243.My vote goes to a 243 because it is good enough for small to medium sized game.The rest you can blow up with the big guns.