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Not quite correct. With bullets up to 150 grs the .308 and the 06 are ballistically identical. When you get to heavier bullets the .308 lags behind because the heavier bullet is longer and eats into the case powder capacity. But if you stuck any well made 150 gr bullet from a .308 into a grizzly's lungs, you have the makings of a nice rug. Lots of them have ben killed with a .270 too.

But there is no way you're gonna tote a .50 BMG on a hunt. Too heavy and too cumberson.

Bullcamp82834

If I had a .50 BMG and a grizzly tag I bet I'd figure out a way to transport the rifle in the field. That would be just too cool. Maybe hire a big burly gun bearer.

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He'd have to be pretty stout and in shape. I got to play a little with one of the 50 sniper rifles when I was in Iraq. I wouldn't want to tote it much more than about 200 yards. By the way, sniper nests with a 50 are usually pretty close to where the can get vehicles or land choppers for that reason, it isn't a real mobile system. If they need to hump into the boonies with a sniper rifle they usually use a .308 or a 300 Win Mag.

Another of my favorite bumper stickers. Seen in Montana and Idaho, but applicable in other places as well:

DONT CALIFORNICATE MY STATE

Over by Rifle, CO right along I-70 a rancher put up a homemade billboard the said :DON"T CALIFORNICATE COLORAD! but it didn't work. The idiots still came and screwed the state up royally.

Murby

I shoot 180 grains in my AR10... It was the 300 Mag that my buddy brought over to compare to the 308 that I was thinking of.

Still, I thought a 30-06 was larger for some reason..

Tells ya what I know about ammo...

Ok.. I'll settle on the 308 then... something belt fed will suffice...

flags

You're correct in that the 06 is a bigger cased cartridge. The 308 is an extremely efficient cartridge which is why the military adopted it. Because it is so efficient it holds its own against the bigger round until the bullet gets too long.

The 308 is also the base cartridge for the 7mm-08, the 358 Win, the 260 Rem and the 243 Win. Necked up or down it is and will always be a really good round. If I wanted a mid power 30 cal, I'd jump on a 308.

And it comes in a belt feed too. The M-60, the M-48, the M-240 and the MK-44 are all 7.62 Nato which is the military designation for the 308. The military knows what works.

Fletchman

The 30-06 and 308 are very close ballistically. However the 30-06 can be loaded to about 200 fps faster than a 308 due to case capacity. The 308 is a more accurate round but thats for target competition. For hunting purposes they are the same. Your AR-10 loaded with a good nosler partition or swift A-frame would kill a Grizzly with good shot placement no problem.

bigmoose

As a big game guide in Alaska and having been charged 6 times in just one season. I will not guide anyone Grizzly hunting with a 308. A 30-06 is enuf of a step up that I do allow it. Just know the shots will be considerably closer. I had a client take an 8 footer this past season with one. I would much prefer 300 Win. or better. I've seen enuf hits on big bear that looked like good hits but after he nips at the entry wound and then looks your direction, and then it's oh #$%^. Grizzly hunting think 338- 375.