Remington Model 700 Bolt-Action in .270 or .30-06! That's where you get your accuracy at longer range shots! I would also look at a 7mm Remington or Weatherby Magnum, especially for those shots over 300 yards.

As far as chambering, the 30-06 is the bare minimum, and I feel adequate enough. I have one and would not hesitate to use it on any animal in North America short of Grizzly. It is probably enough gun for Griz but I would "FEEL" better with a big punch. But since I, like most people, want to carry more than I actually need, for those three I would love to have something in the .300 to .338 magnum. Good standard would be the .300 Win Mag. More than adequate for all three. If a nice trophy Moose stepped out and I was to nervous to wait for the perfect broad-side shot then I would shot the quartering front shoulder. A 30-06 will more than likely kill a big Moose in that shot, but it may not put him down quickly making retrieval difficult at best. But the .300 mag would probably put him down in short order no matter the angle.

It's hard to beat a good 30-06

The 300 Rem Ultra Mag is a great choice if you don't mind paying extra for the different levels of loads. I really like the theory behind it but I want to be able to hand load the different levels myself. I haven't seen or read much about it as to any problems with the different levels of ammo. But the theory is sound and very interesting. It is a very good possible choice. One gun that is a 30-06, 300 win mag and a 300 win mag+ all in one. Sounds awesome.

A .30-'06 will serve your purpose as well as anything,
just place your shots well. If bears could be encountered where you hunt, I would seriously consider a .338 Win Mag, but they have more recoil than an '06.

bear39, I owned a 300 Win Mag and replaced it with a 25-06. When I found I was going to be stationed in Alaska, I knew I needed a cartridge that would be effective on Bear and have long Range potential and accuracy. I chose the 338 Win Mag and after 4 years in AK, I never regretted it. There is a serious problem in cartridge selection when deciding what to use. Remember, the average shot is going to be less than 200 yards more like 100 or less. If you look at the performance range of the 30 caliber bullets, you’ll find that the 30 cal magnums are either at the maximum performance range or well over it in velocity causing the bullet to explode rather than to penetrate which I’ve witnessed numerous of times. The 30-06 will do you a fine job, personally I prefer the 338 Win Mag. One more thing, were you find Elk and Moose you got big bear in the area to. The best and preferred rifle that worked best for Alaska I witnessed was the 338 Win Mag, but you got to find one that suits you the best, 73's :)

Hey Happy, the definition of over kill is a 375 H&H.

Fella wounded a nice Bull Caribou never to be recovered but he also knocked down three cows with one shot!

Clay,
I have been in situations were a 375 was under kill, so it all depends on the circumstances. Every time we generalize, exceptions occur. I have taken moose with 7mm Rem Mag, 06, 300 Win Mag, and 338 Win Mag. No complaints from a one.
I have taken well over 100 animals with the 300 Win Mag alone with all types of ammo and short range to long range. Only had one round blow up. It was 150 grain Sierra on a record book pronghorn at 25 yards, still killed the critter on the spot. I had crawled along a dry wash wash for what seemed miles until my knees were bleeding and holes worn in my pants. Peered over the bank top between two sage bushes and he was right in front of me. So much for long range pronghorn hunting.

I'll take the 2nd book!

Happy, I had that thought in mind about the 375 H&H being under gunned, that's why I said, "but you got to find one that suits you the best"

Those inland Grizzly Bears are nothing compared to their cousin the Brown Bear living an ultra rich protein diet of salmon and other! And yes, I did feel under gunned at times with my 338 Win Mag but I knew my 250 grain Nosler Partition and knowing I can hit with it made up the difference. I'm kicking myself in not taking one!

As fond as I am of .270 win. I would go with .30-06 with moose in the equation. I have yet to hunt anything for which I felt a need for "mag." after the numbers in a rifle caliber. But, hey, thats just me. Winchester may have gone under by now if they hadn't introduced and effectively marketed their WSM line.

30-06 or 300 win mag

Before the new high quality bullets being produced by many manufactures today, the advantage to the various 30 Mags was they could efficiently kick along yesteryears more poorly constructed heavy bullets, ie 200 plus grains. They did not blow up small animals and took care of business with big critters. Today, most folks think of ultra high velocity as the only solution to all hunting issues. Indeed, case capacity gives the hunter bullet weight selection to fit the needs of many situations. Momentum may not be have the glamour of velocity, but it is an important part of the ballistic equation

Hey Bee, find a load yet for your 338-06?

Happy, excellent point Sir! If I had the same choice of bullets back when I was in AK, I probably would have went with a 375 H&H? Just about anything back then was round nose in the Big Bore category with no long range ability. I wish I had a dollar listening to those hunters coming back to the range wishing they had more of a flatter shooting bullet or round than the 375 they had. But of course what the actual range they were shooting is yet to be told!

Dang it Bee you beat me to it. I am falling in love with this 338-06 of Bill's. That 210 grain TSX at 2830 fps is just right. He wants to sell the gun and I think he is getting me hooked. If you have Barnes reloading manual number 4 go to the page 285 read the story on 338-06 for moose.

210 grain TSX at 2830 fps? Will do a mighty fine job it will!!!!!!

If the 338-06 can push a 210 TSX at 2830, I wonder how fast my 338 Win Mag can thump it?

I would suggest the .300 Win Mag for the average Joe hunting all North American big game species. Although the 30-06 will do a great job, I like the added speed of the Win mag and above. I myself shoot a .300 Dakota for bigger game because it has the speed of the .300 RUM with much less recoil and much better accuracy (I get .1 inch groups). However, I realize it is not for everyone because you will have to expand your bolt face and receiver rails and barrel it yourself or you will have to spend $6500 on a rifle. I have shot almost everything I ever shot (lots of p-dogs, deer, coyotes, & antlope) with a 25-06 though.

I use a .270 but most will say a 30-06. I've gotten 24 elk in 26 years. Why fix it if it's not broken....
One shot, one kill.

300 WSM with proper bullet selection will give outstanding results on all three.

30-06 is my vote as long as you're confident with it plus ammo is cheap and easy to find.