Is 10mm viable for bear defense?

Lots of good advice here in the previous posts.

I've killed more than a few big game animals, including a charging black bear and a standing Cape Buffalo.

The bear was shot at contact distance with a 444 Marlin rifle (300gr XTP's). It had powder burns on it's forehead. Bigger is better, but any handgun you can shoot accurately will be better than one you cannot. There are lots of documented bear kills with 9mm/357 class pistols.

I've carried both 10mm & 44 mags in bear country, and would feel well protected with either one. The real advantage of the revolver is it won't jam during a contact shot or be limited to one shot if you happen to eject the magazine by accident during the fight.

For me the handgun I'll carry is either a 45acp pistol with 230gr FMJ ammo, any good 10mm with 200gr FMJ's, or my 44Mag S&W M69 with 300gr solids at a stately 975-1000fps. All are easily carried and have enough penetration to stop with a head shot.

But for a primary weapon, it's at least a 308Win rifle or slug loaded shotgun.
 
Location, location, location. Doesn't matter what you carry if you can't hit what you need to. Worry less about cartridge and more about what you can use quickly under stressful situations. As one of the previous posters linked to, a 22 can take down a grizzly. Would I want one, H$ll no. I think under the right circumstances you could carry a 357 on up and be okay.

Location, location, location
 
I grew up hunting and fishing Alaska.

I’m in the minority here. After what I’ve seen, there ain’t no way I’m trusting a 10MM for bear.

I remember when the 10 initially gained popularity for bear. It had nothing to do with shear stopping power. It was because of the spray and pray mentality.

The article the OP provided is proof of this and also proves that situational awareness is far more important. You should never find yourself surprised by a bear. And leave the dogs at home.
 
Bear recognition

Yes...here they give classes in Bear Recognition. If it is a Black Bear or Grizzly, climb a tree! The Black Bear will climb up after you...the Griz will just shake you out of the tree!
 
Lots of good advice here in the previous posts.

I've killed more than a few big game animals, including a charging black bear and a standing Cape Buffalo.

The bear was shot at contact distance with a 444 Marlin rifle (300gr XTP's). It had powder burns on it's forehead. Bigger is better, but any handgun you can shoot accurately will be better than one you cannot. There are lots of documented bear kills with 9mm/357 class pistols.

I've carried both 10mm & 44 mags in bear country, and would feel well protected with either one. The real advantage of the revolver is it won't jam during a contact shot or be limited to one shot if you happen to eject the magazine by accident during the fight.

For me the handgun I'll carry is either a 45acp pistol with 230gr FMJ ammo, any good 10mm with 200gr FMJ's, or my 44Mag S&W M69 with 300gr solids at a stately 975-1000fps. All are easily carried and have enough penetration to stop with a head shot.

But for a primary weapon, it's at least a 308Win rifle or slug loaded shotgun.

Interesting, never thought of the fact a semi could jam during contact shot.
 
The 10mm is only 11 - 16% less "powerful" than the .44 magnum. Total potential deliverable energy is 12,000 foot-pounds. Even the mighty .500S&W short barrel maxes out around 10,000 foot-pounds with top loads.

Hot 10mm is at about 800 ft-lbf of muzzle energy.
Hot .44 Magnum is at about 1,300 ft-lbf of muzzle energy. -> 63% more than 10mm
Hot 500 S&W Magnum is at about 3,000 ft-lbf of muzzle energy. -> 275% more than 10mm / 15,000 ft-lbf per cylinder

The revolver equivalent of 10mm Auto is .357 Magnum. Currently, the only viable semi-auto options punching in the same class as .44 Magnum are .429DE and .50AE.
 
First off I live in Ohio and have never faced a grizzly in the wild. So my opinion is worth much, haha. However:

In my humble opinion the circumstances matter. I mean if you're in Brown bear country and you're out in your backyard so to speak I'd say a 10mm is fine. Although I agree with the guys that say having 15 rds. or whatever most likely isn't going to matter much.

However if I'm going "up in the mountains" or way out in the outback I'm going to be armed with something more than a pistol. 12ga. loaded with slugs and 00buck, .338 wing mag? Something with A LOT more knock down power than a pistol.

My thoughts exactly. I live in Ohio as well, we have more black bear sightings where I live than any part of the state, yet I have never seen one. Luckily a Black Bear has a much different mentality than a Grizzly and are far smaller. I've never seen a bear other than in the zoo so my opinion does not mean much, however Tim Sundles of Buffalo Bore has a ton of experience on the matter so I thought I'd link his thoughts which are backed by years of experience and actually hunting/defending against Brown bears. If you are out looking for bears I'd recommend something like a rifle or shotgun as suggested here, though I'm sure a 10mm would be better than nothing.

"Stopping" bears with handgun or rifle cartridges
 
My only bear encounter scared the heck out of me. He pushed on a tree and made it crack about 50 yards up a steep ridge from me, then slunk off into the bushes while I was jumping out of my skin.

Then he went on the highway and got hit by a car, which probably carried a lot more energy than the 9mm I had. It got him stuffed and displayed in the county museum.

This at a time when the state DNR was saying “No black bears around here, nope!”
 
Is 40 caliber that far off from a 10mm as far as power vs. a very large and hungry bear?

Yes, you lose about a third of muzzle energy, ending up a little bit above 9mm, with a bigger bullet that will likely not penetrate as well as 9mm. Penetration is important as a large bear charging you will face you with its massive shoulder bones protecting the vital organs. In a high-capacity semi-auto, you probably shouldn't go with anything less powerful than 10mm Auto, .357 SIG or 7.5 FK.

If a .40S&W was all I had on me when a large bear attacked, I'd make use of the pistol's main advantage and shoot fast. Every hit will cause some damage, and the more hits you get the higher are your chances of a lucky hit. With very powerful rounds such as .475 Linebaugh, .454 Casull, .460 S&W Magnum, .500 S&W Magnum and .50AE on the other hand you'd aim much more carefully, knowing that one good hit will very likely end the threat.
 
All joking aside, if I were seriously going into bear country and wanted to carry something lightweight yet still capable of stopping a bear, then I would take my H&K USP45 Elite.

attachment.php


One of the most rugged, reliable semiautomatic pistols out there, and capable of handling .45 Super without any modifications. Plus, this is the Long Slide Target model, so it's extremely accurate.
 
Interesting, never thought of the fact a semi could jam during contact shot.

Most recent example that everyone knows about is the Travon Martin case where George Zimmerman's gun jammed after the first shot. There are hundreds of others.
 
Demarks artic special forces, the Sirius Sled Dog Patrol, switched over to the Glock 20 10mm as their handgun and caliber of choice for patrol in the artic as they think the 10mm is a good round for polar bears.
 
All joking aside, if I were seriously going into bear country and wanted to carry something lightweight yet still capable of stopping a bear, then I would take my H&K USP45 Elite.

attachment.php


One of the most rugged, reliable semiautomatic pistols out there, and capable of handling .45 Super without any modifications. Plus, this is the Long Slide Target model, so it's extremely accurate.

I certainly would feel well equipped with that beautiful H&K. Very cool to see one with a longer slide like that too.
 
Demarks artic special forces, the Sirius Sled Dog Patrol, switched over to the Glock 20 10mm as their handgun and caliber of choice for patrol in the artic as they think the 10mm is a good round for polar bears.

The Sirius Dog Sled Patrol is often brought up when discussing 10mm Auto, but it is not really a good argument. First, they don't use the G20 because they think it's the best tool for the job, but because it's the best handgun that is inexpensive, lightweight and reliable and can be shot by every officer (apparently they're tougher than FBI agents :rolleyes:). Second, the G20 is carried as a weapon of last resort, their main weapon is the M1917 Enfield using the .30-06 M2 armor-piercing cartridge. That round has a muzzle energy on par with a hot 500 S&W Magnum round and can penetrate half an inch of steel, it will definitely penetrate a polar bear's shoulder bone, every time, and it will still have the kinetic energy of 3 hot 10mm Auto rounds combined once it passed the bone. That is the weapon they trust to protect them against polar bears. The G20 is there for when the bear is already on top of them, and it's probably also useful for their policing duties.
 
Back
Top