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308 for grizzly bears?

This is a discussion on 308 for grizzly bears? within the Steel and Wood forums, part of the Rifle Forum category; well i am going up to northern canada and were i live in canada(northern sask) there are only blackbears. were i am going there is ...


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Old June 24th, 2012, 08:13 PM   #1
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308 for grizzly bears?

well i am going up to northern canada and were i live in canada(northern sask) there are only blackbears. were i am going there is a good population of grizzly bear. the biggest gun i have is a 308. i have read the a 308 is not able to take down a grizzly? people recommend a 300 wm and up. a couple of guys i know hunt polar bear with 308 and even 223!! i have been comparing the 300 wm and 308 and the only difference between the 180 grain rounds is 1000 ftlbs. so my question while hunting for grizzly is my little 308 gona be enuff to take the animal with one shot if i him him is the correct spot? btw my firearm is a savage 10 fcm scout and shots will be 150 and under. in my opinion this is similar to the 223 for deer debait.
thanks.

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Old June 24th, 2012, 08:19 PM   #2
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There is no comparison between a 300 Win Mag and a .308. The 300 WM carries a huge amount of energy. Your talking about 180gr bullets, I would use a heavier bullet in a 300WM. A 220gr bullet from a 300 WM, carries more energy at 1000 yards than a .44mag does at point blank range. That should give you a better idea of the capabilities of a 300WM. If I was going against a grizzly, I'd much rather have the magnum.

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Old June 24th, 2012, 08:24 PM   #3
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Over the years, the wife and I have shot a lot of game with the 308.

Including some pretty big stuff in Africa.

The only difference between a 300 Mag and a 308 is velocity.
We have killed a lot of game with a 300 mag as well.

So what a 308 does at 200 yards a 300 Mag does at 300, what a 308 does at 300 yards a 300 Mag does at 400, etc...

If you are going to carry a 308 in Grizzly country, and we have done so, just make sure you use a good premium bullet. Something from 165 gr to 180gr like a Nosler Partition, Trophy Bonded Bearclaw, one of the BarnesX bullets, a Swift A Frame, or a North Fork.

With a 308 and one of those bullets I would have no worries.

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Old June 24th, 2012, 08:27 PM   #4
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I have not personally hunted grizzly and you should keep that in mind as I proceed:
My understanding is that PENETRATION is key in stopping these animals and projectile integrity is a main theme in attaining that goal.
Thus, a partition design, a bonded core design, or something in a mono-metal solid-type design such as Barne's type projectiles is likely to provide the most consistent, deepest penetration and keep together best if it hits bone or other hard body parts.
....
In loaded ammo someone's "premium" lineup should have something loaded in 308 Win with these types of projectiles.
...
To back up any choice for your stated purposes I would get on the phone to the ammo and also the projectile manufacturer (first choice) and confirm that they have confidence in your using the ammo/projectile for your purposes.
...
While a bit off-topic I'll just share that a long time ago Nosler came out with the Ballistic Tip concept. It was advertised as being "for deer size" animals. Well, I took some of that, loaded it up in a 30-06, and shot it at jack rabbits and literally blew every jack rabbit I hit into small pieces with every main body hit. This is NOT the kind of surprise you need when facing grizzly! Thus, getting on the phone and CONFIRMING that the projectile at least is rated for grizzly would go a long, long way towards me thinking about using it in a 308 Win for that purpose.
(Nosler solved the early Ballistip tip issues long ago and now they have a good reputation for working on deer and not blowing up too soon.)

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Old June 24th, 2012, 08:33 PM   #5
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Bring enough gun...

Quote:
Originally Posted by snowsniper8 View Post
well i am going up to northern canada and were i live in canada(northern sask) there are only blackbears. were i am going there is a good population of grizzly bear. the biggest gun i have is a 308. i have read the a 308 is not able to take down a grizzly? people recommend a 300 wm and up. a couple of guys i know hunt polar bear with 308 and even 223!! i have been comparing the 300 wm and 308 and the only difference between the 180 grain rounds is 1000 ftlbs. so my question while hunting for grizzly is my little 308 gona be enuff to take the animal with one shot if i him him is the correct spot? btw my firearm is a savage 10 fcm scout and shots will be 150 and under. in my opinion this is similar to the 223 for deer debait.
thanks.
When I first started hunting black bear in Alaska's Prince William Sound I carried a .308. One day I was stalking a black bear in Jack Bay outside Valdez when a griz came out of the bushes a couple hundred yards away. There were not supposed to be any griz in that area but I guess he didn't know that. As I recall he seemed like about an 8 footer - not huge but a lot bigger than your average PWS black bear.

The size of that bear really spooked me. I went home and ordered a .338 Win Mag and THAT became my bear hunting gun.

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Old June 24th, 2012, 08:35 PM   #6
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the head of the bullet didn't blow up,the energy from the bullet passing through soft tissue causing the liquid in the rabbit to basically go in an outward direction

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Old June 24th, 2012, 08:36 PM   #7
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just pick a good solid 308 bullet

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Old June 24th, 2012, 08:46 PM   #8
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only from a tall tree. And even then only with a full mag and back up mags. After all, I will want to come down out of the tree before it gets dark.

Will a .308 kill a grizzly bear? Hell yes. Will I try it? Hell no. I've got nothing to prove with the M1A I can't prove with a bigger caliber/rifle.

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Old June 24th, 2012, 08:50 PM   #9
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only from a tall tree. And even then only with a full mag and back up mags. After all, I will want to come down out of the tree before it gets dark.

Will a .308 kill a grizzly bear? Hell yes. Will I try it? Hell no. I've got nothing to prove with the M1A I can't prove with a bigger caliber/rifle.
I like the way you think brother!!!!

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Old June 24th, 2012, 09:04 PM   #10
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I've been in on killing 26 grizzly/ brown bears while guiding in Alaska.
Will a 308 kill a grizzly bear? Yes it will, given good bullet placement.
What it won't do is stop a grizzly bear.
Killing a bear that is unaware of your presence is one thing. You'll have time to set up the shot and wait for the right opportunity. Maybe you'll shoot him 1,2,6,10 times and the bear will go off and die.
A 308 just doesn't have the energy to break bones and cause the kind of trauma required to stop a grizzly. Sometimes a 375 H&H won't make him stop in time.
Good Luck,
Brent

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Old June 24th, 2012, 09:06 PM   #11
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If your talking about the real estate trained chinese attack bears, there is no substitute for 45-70 GOVT.



might be worth picking up an used marlin or rio grande .. they are cheap and easy to carry.

a scoped 300 win mag will be hard to handle under stress.

Thanks from GARRARD and LausDeo
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Old June 24th, 2012, 09:14 PM   #12
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I am told that flat nose bullets will cut through a bear's stull like a hot knife through butter. This was in a discussion about loading data for my .45-70 though.

I'm told that a ~1750-2000 ft*lb load using 405gr RFN will work. I'm aiming for a ~3110 ft*lb load. Buffalo Bore's 405gr JFN is ~3615 ft*lb (and will break your damn shoulder).

M80 is roughtly 2580 ft*lb I believe. You can plug in the rest of the .308 and .300win mag numbers yourself, converting units was a pain in the rear. KE=(MV²)/2

The problem is that the 405gr RFN is much more suited for bear than a 150-220gr FMJ spitzer. Remember you want to stop him, not kill him after he's already got you.

EDIT: if you do go after a Marlin, go for an older one, older than March 2010. I didn't have a good experience with my Rio Grande either, hence my 1886.

Thanks from Dredsen
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Old June 24th, 2012, 09:20 PM   #13
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laus can you find that thread..... the one where the forum member did testing on bear skulls?

that would be useful to the OP i bet.

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Old June 24th, 2012, 09:28 PM   #14
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Thanks for the replays. I think i will try my 308 for a year and see how that goes In the mean time i will be hunting with my dad and he will have a shotgun fully loaded with deer slugs. So if the 308 doesn't get the job done that will!

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Old June 24th, 2012, 09:51 PM   #15
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Quote:
Originally Posted by akjaeger View Post
I've been in on killing 26 grizzly/ brown bears while guiding in Alaska.
Will a 308 kill a grizzly bear? Yes it will, given good bullet placement.
What it won't do is stop a grizzly bear.
Killing a bear that is unaware of your presence is one thing. You'll have time to set up the shot and wait for the right opportunity. Maybe you'll shoot him 1,2,6,10 times and the bear will go off and die.
A 308 just doesn't have the energy to break bones and cause the kind of trauma required to stop a grizzly. Sometimes a 375 H&H won't make him stop in time.
Good Luck,
Brent
great info. Bottom line: Bears are no joke.

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