:cb2: Yes, you can hunt deer with a .357. And yes, I could get anywhere I want to go in a compact car. However, my fat fanny would rather be in my wife's Titan 4x4 Crewcab. Either one will work, but one just works a whole lot better. Same with guns.
The .357 will do the job, but like so many others have said, something that starts with a "4" will do it better. If you reload, or know someone who does, the .41 is a great gun. Flatter and not as much recoil as the .44 or .45. However, factory ammo is rather expensive. Choices are limited, too, but there is some good stuff out there. My favorite is the Winchester 240-gr. Platinum Tips. I think the .41 mag is the best bet if you reload.
The .45 Colt and the .44 mag are pretty well equal in power and results. The advantage of the .44 is that there are a gazillion different rounds on store shelves to choose from, and locally, .44 mag ammo is cheaper than .45 Colt. And as stated above, you have the option of shooting .44 Specials in it. Personally, I wouldn't hunt with .44 Specials. Sure, people have done it for years, and the .357 has also taken about everything you can think of in North America at one time or another, but there are just too many better options out there for you today. I like the .41 best for deer sized game, but the .44 may have the overall advantage, just because of the ammo selection.
Whoever suggested the .40 must not have realized you were going to use this gun for hunting. It's strictly a self defense round, to be used on two-legged creatures, not four.
I've gotta bunch of .357s and I love 'em. If push came to shove, and that was the only thing I had, yeah, I'd hunt with it. But, again, don't cramp yourself--get enough gun. Don't get more than you can handle well. There is a such thing as overkill, even with handguns (though I know some folks will disagree with that!). A .41, .44, or .45 Colt should do the job quite well. This will be your hunting gun. Get the .357/.38 for self-defense, plinking, and small game.
Good luck, and good shootin'!