Here's an interesting personal tidbit that is relevant to this thread.
I grew up reading the books of Jim Corbett. To this day, I think he is the greatest outdoor writer and adventurer I've ever read. In my personal opinion, guys like Elmer Keith are just macho posers compared to Corbett, who was the real deal as a hunter, shooter, humanitarian and conservationist, not to mention a truly masterful writer.
Here was a fellow who was such a calm, accurate and confident shooter that he only carried three cartridges. And he was in some dangerous country, man, surrounded by King Cobras, and man-eating beasts of different varieties.
For me, the greatest single adrenaline-filled moment in all of the outdoor writing I've ever read is the final showdown with the Mama tiger in the tale of the Chowgarh maneaters. At the end of an incredible stalk and counter-stalk, Corbett's sixth sense tells him that the maneating tiger he's been stalking has out-stalked him and is crouching behind him. He knows intuitively that if he turns to look, the movement will spook the animal and it will jump him. What does he do?
This is one of those rare cases where having a big gun would have gotten him killed because of its cumbersome length and weight. Fortunately, he was carrying a super lightweight Rigby Mauser in .275 (aka 7x57). The rifle was sort of comparable to our modern mountain rifle concept. What Corbett did was literally raise the rifle out in front of him with one hand then slowly twisted it up and backward like a wand so that it ended up pointing behind him. Can you imagine the kind of strength and calm it would have taken to do this, knowing that the wrong muscle twitch would be the end? Even more surprsingly, he managed to fire the rifle... and he HIT THE TIGER IN THE HEART JUST AS IT WAS ABOUT TO SPRING!!!
Eventually, I had to get myself a lightweight 7x57 in tribute to this incredible man. When I was offered an FN-made Brazillian '98 military carbine in 7x57, I didn't even take a moment to decide. It's no Rigby Mauser, but it is similar in spirit and mechanics to Corbett's rifle. And the cartridge is certainly the same.
Personally, if I had to hunt big tigers in the jungle, I'd want at least a .375 Holland & Holland or anything that would be appropriate for a big grizzly. However, the idealistic part of my thinks that the job could be done in style with a 175-grain bullet pushed by 49 grains of WC 852 from my Mauser
