So is 30-06 big enough for dangerious game or just for plains game. In other word can you take Buff/Dugger with it.

It's been done but good luck finding a PH that will allow it. It's usually illegal too.

In most countries .375 H&H is the minimum caliber for dangerous game. Although I'm sure you can use the -06 for most of the rest.

Zim allows 9.3 if it meets energy requirements. In RSA it's by state or province or whatever they call them.

Looks like I'm out of date again.

Thanks.

Sorry thought you were talking NA buffalo

30-06 will do that. I used a 338-06 on mine.

Roger that. 06 maybe aittle lite for really big stuff. 375 H&H seems to be the goto.

The 375 H&H is Africa's version of the 30-06

back in 2003-2004 there were many articles on 30-06 being very good for plains game I wouldn't try eland with it. though

375 H&H is a better caliber for dangerous game & plains game.

I've read a few guys suggesting a 338 winmag for African plains game, or 375 RUM if you can tolerate the extra recoil.  375 H&H shoots a lot like an '06 as far as trajectory goes, though it kicks a lot more.  Now recoil of the 375H&H is not that bad, comparable to some heavier 12ga loads.  My wife who can barely handle a 300winmag on a bench can handle the 375 H&H standing with no issue.  For the meaner stuff like cape buff, etc, 375 is the min as stated before in many countries and rightfully so.  If you're a recoil sadist, then look into a 416 rem mag, 458 winmag, or 458 LOTT.  I have a 416 rem mag on order from Buds right now, and am anxious to see how I can handle the beast.

I've taken many species in RSA and Zimbabwe with my 30-06. Largest was a big bull kudu though. I shot eland with .300 WSM which was plenty but I don't think the '06 would have done the job as well. No way I would go on a buffalo or other dangerous game hunt with a 30-06 as my primary weapon though. One trip a few years ago one of the fellows in camp shot a cape buffalo several times with a .375 but it didn't go down. The next day I was hunting with the 30-06 near the area the trackers thought the wounded buffalo was in. My PH warned me and said if we see it to shoot it in the eye since all I had was 180 grain bullets. They found it nearby and still had to shoot it 3-4 more times with the .375, damn tough animals.

If you are comfortable with your 375 H&H, I don't think you will have a problem with a 416 Rem Mag. I have winchester model 70's in both calibers. The 375 H&H is fairly pleasant for a medium bore and the 416 RM is not bad, even though its definitely a step up, though neither are particularly fun from a bench.

30 -06 can certainly take any species in Africa...but as mentioned, it's illegal in most countries and you won't find an outfit that will allow it.
I've seen 30 -06 take a lot of plains game. It will easily take a kudu or even eland...but once you start looking at things that stomp, bite, claw and gore - go for bigger.

I remember a few poachers getting busted not too far from us in the KNP - they had just poached elephant using a FAL and a G3.
Also remember a murder & robbery squad in a small town. They got busted for poaching a kudu using their 9mm's and FMJ's. They came chargin back into camp after a long day's fishing and drinking, with their prize on the back of the truck. I was in no state to drive, so I crawled into my truck, locked the doors and pretended to be asleep - wanted nothing to do with that fiasco. I think all but 2 of them ended up losing their jobs...

Anyways, 30-06 is a great caliber for anything but the big 5. I have not personally hunted the big 5, but if I did, I'd want something with a bit more oomph...

http://forums.accuratereloading.com/eve/forums/a/tpc/f/1411043/m/7731065341/p/1/xsl/print_topic

Has it been done?  Yes.  Is it ethical?  No.  Is it legal today? Absolutely not.  One must learn to know right from wrong, regardless of legality.  I have enough respect for dangerous game to use the correct tool for the job.  If one can not afford anything but a 30-06 to hunt dangerous game, then they likely can't afford to hunt in Africa anyways.  Anyone who can handle a 30-06 with ease, can handle the recoil of a 375H&H.

I was at the big NRA hunting show in Harrisburg last year and spoke with a gentleman running tours in South Africa.  I asked him what calibers were allowed and he told me he preferred 180gr 30/06 and larger calibers.  By the way, those hunting tours in Africa are cheaper than many in the us    It's the air fare that's the killer

From what I have read the 308 is what most locals use for plains game and what poachers prefer on basically anything, but they don't have money to buy 375's and they just shoot until it drops.

Buy a ticket in advance and it is less than 1k round trip, how much is a domestic plane ticket?

Locals run 243, 303, 308, 3006 and 7x57...in my experience. But that's usually limited to stuff like Kudu, bushbuck, impala, gazelle and warthog...stuff available on regular farms. Don't have a lot of Eland and zebra running around wild anymore.
Domestic flights are similar to the ones here in the US...about R400 to R1500 depending on where, when and what comfort level you want.
Flying domestic in SA is NOT for the novice...especially when transporting anything out of the norm. Theft on domestic flights is expected.