7MM mag with 160 or 175 grain bullets, .308 or 30-06 with 180 grain bullets, any of the .300 mags, .338 win mag, .35 whelen, 9.3 x 62, .375 H&H and many, many more......
Whatever rifle you use, use premium bullets such as Nosler Partition or Barnes X....
This has been talked about on here more times than I can remember. If you do a search for "elk rifle" you should come up with tons.
Basically anything from the 7mm-08 on up will cleanly take any elk out there provided you can shoot. If you put a properly constructed bullet in the lungs the result is a dead elk.
__________________
"The danger to America is not Barack Obama but a citizenry capable of entrusting a man like him with the Presidency........... Blaming the prince of the fools should not blind anyone to the vast confederacy of fools that made him their prince. The Republic can survive a Barack Obama, who is, after all, merely a fool. It is less likely to survive a multitude of fools such as those who made him their president."
Despite all the stories about bullet proof bulls, I figure the .260 is the smallest I'd be comforable with. You can put a 140 grain 6.5 thoruouh an awful lot of elk meat. [8D]
__________________
Jest an ol' man livin' in the mountains.
270 and up, light weight, have good optics mounted on them, shorter the better longer barrels (mags) make it harder to move thru the forest.
__________________
" Lost Highway"
Life is a tale....full of sound and fury- Wm. Shakespear
You go to heaven for the climate and hell for the company- Mark Twain
A good elk gun is likely your old deer gun, but loaded with a premium bullet like the Barnes Triple Shock or Winchester Fail Safe. You have confidence in the gun, can hit where it counts, and that combination beats an unfamiliar new belted cannon that hurts to shoot, promotes fliching, and temps you to take irresponsibly long shots.