In almost 50 years of western U.S. big game hunting (including 20 years of horseback hunting in Montana's wilderness areas), and a half dozen plus international big game hunts, I have never had an issue with my rifle scopes. So I don't worry about backup iron sights or bringing an extra scope. Also, every PH/guide that I've ever hunted with had a loaner rifle available for hunters.
View attachment 30627 Not when it's a ruger model 1 with a Leupold VX model scope on it Tarbe.
Got to love a a Ruger #1 the great shooting rifle that it is. My Ruger #1 in 300 Win Mag above with a Bushnell scope makes short work of African plains game! and I shoot it extremely well.
The best plains game gun in the one you shoot best with a good bullet like a tsx or a frame.Hear all the talk of needing a big bore which must guys can not shoot.
Son has been two africa twice now and taken animals with a 25-06 and this last trip a 257 weatherby with a 100 grain tsx.
We took so many animals that never took a step with that 257 this trip.
Anything up to kudu I would use that gun.No eland but zebra,kudu impala,springbuck,oryx,waterbuck and bushbuck no problem out to 300yds.
I think to many guys get caught up in calibers and they all get the job done if the person pulling the trigger does there job right.A gut shoot is all the same be it a 257 or a 458.Gut shoot equals a long trcaking day any way you cut it.
The biggest thing about guns that is overlooked and means more the what size the gun is.Get the trigger worked and set to 3lbs or so.A good trigger can make a good shooter a great shooter and a avg shooter and good shooter.
I know that African plains game can easily be taken with a host of smaller calibres, such as 7mms or .30 cals, and as Tarbe stated, it is hard to get more 'African' than a .300 H&H Magnum.
That said, I have shot almost all of my plains game, from warthog and impala up to zebra, kudu and sable with a .375. I like the idea of taking a .375 because, with the right bullets, it is just as flat shooting as a .30/06 but has a lot more authority. However, the big advantage of taking a .375 is that you have a rifle that is suitable for the big five should an unexpected opportunity present itself - such as a problem animal or a cull being offered to you. True, this doesn't happen very often (almost never, in fact) but it has happened to me and I fortunately I had the equipment to accept the opportunity - I would hate to miss the chance because I had a .30 calibre instead of a .375.
One other huge advantage of the .375 is that you can always buy more ammo if you need it, almost anywhere!
In regards to having open sights on your rifle - I will not have a rifle that doesn't have open sights fitted to back up the scope, and my scopes are always mounted in QD rings. While it is unlikely that a quality scope will fail on your hunt, it is a possibility and after spending a fortune on your safari, it would be a terrible shame to pin all of your chances on a single sighting system - I am a huge believer in redundancy. Indeed, a lot of my hunting rifles have multiple sighting options: open sights, a quality riflescope in QD rings and a red-dot sight in a QD mount as well; which means that I am equipped for all situations.
Some of my favourite hunting rifles are older model BRNO ZKK series rifles which have four (4) sighting options: folding rear open sight, pop-up aperture, scope in QDs and a red-dot in QDs - I told you that I like having redundancy in my sighting systems!
Accordingly, I do not understand why rifle manufacturers produce so many rifle models that are supplied without open sights and why so many hunters put all their faith in one sighting system - it doesn't make sense to me.