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Underwood Extreme Penetrator 10mm vs. 44 Mag on Grizzly Skull

12K views 106 replies 21 participants last post by  fredj338  
#1 ·
#6 ·
Pppfffttt... .45 LC over the .44 any day. The .44 isn't even a .44.
Honestly though, not a huge diff in the two with heavy solids imo. I like both, use both in hunting & for back packing. Nothing is stopping a 270-300gr LFP running just 1100fps. Would rather have either over a 10mm for big bears.
 
#10 ·
Me? I'd rather have a 250-315gr heavy weight .44MAG or .45Colt for a big, thick skinned, extremely dangerous animal that can move fast.

Penetration is all well and good, but you still want the largest frontal area possible, and as much mass as possible, to break things apart while digging deep.
 
#11 ·
Me? I'd rather have a 250-315gr heavy weight .44MAG or .45Colt for a big, thick skinned, extremely dangerous animal that can move fast.

Penetration is all well and good, but you still want the largest frontal area possible, and as much mass as possible, to break things apart while digging deep.
Agreed. Strikes the balance between power, carryability, and shootability. 45 Colt loaded properly is a beast.
 
#13 ·
Your dad, is the kinda dad to have amigo! Did the same with my late son. Started him out when real little. Advantage of ranch life. We're always where we can shoot, and be in the woods/hills/canyons. 44mag/45lc, 'copious amounts' of Unique/2400/H110. 275/300gr WFN 24.0grs H110, in both cals, my favorite for possible "heavy work." ;) Gotta love big bore Hog Legs !

I better go before I get started! ;)

Have fun guys!



CM
:horse:
 
#14 · (Edited)
This reminds me of when I once had a younger partner who started in the pistol days, several years after we'd transitioned from .357 (and larger) revolvers to hi-cap 9's ('89/'90). He was a very tall, strapping young man, who was also on our swat team.

One time he'd asked about .44 revolvers previously carried in police work, basically wondering why anyone would carry a caliber that was so slow to shoot due to the recoil.

Well, he wasn't wrong about Magnum revolvers having more recoil, especially compared to 9mm pistols, but he didn't seem to believe that some skilled revolver shooters weren't as slow as he assumed. I offered to being one of my .44's to the range the next qual day and let him try it. I let him shoot some average factory loads.

He was obviously startled by the recoil shooting even the common factory .44 loads, and the 6 1/2" 629 I'd brought for him to try was even Ported, so it was a fairly controllable example of the breed. (Did I mention that he was about 6'5" 295lbs?) It was obvious that he still questioned (with a smile, of sorts) anyone being able to make fast hits with that gun/caliber combo.

Well, since one of the parts of the qual course-of-fire involved shooting some full-size heavy steel pepper poppers, I told him to shoot at one and see how quickly he could keep the sights on it after a shot. It fell faster than he could recover and reacquire a sight picture. (They were balanced to fall over with 9mm hits.)

So, rather than try to convince him that he didn't know what he didn't know, I used the 629 to do a couple of double taps on the same popper (resetting it a couple times) with the second hit landing while the plate was just beginning to move to fall from the first hit. Granted, it was a Ported gun and they were only standard factory Magnum loads. There's something to be said for learning fast revolver DA trigger recovery and full press.

I still miss the days of Magnum service revolvers, though.

Sure, for the "average" shooter/cop anything more than .38SPL demanded "more" of them, as shooters. It required they develop a better handgun foundation handgun skillset to handle more recoil. However, we had some accomplished guys & gals who carried .357MAG, .41MAG, .44SPL/MAG and .45Colt/ACP revolvers and knew how to shoot them accurately, controllably and effectively.
 
#15 ·
Don't mistake my comments about owning a 629 Classic and a Redhawk, and having carried them in my younger LE days, as meaning that I'm fully convinced that DA (trigger-cocking) revolvers have completely replaced SA revolvers, as I like my older Blackhawks (a remaining in-original-condition 3-screw and a New Model/transfer bar model) and SBH. ;) I'm grudgingly thinking that DA revolvers may not be a 'fad' compared to SA wheelies. :p
 
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#16 ·
^^^^^ Funny man. I hear ya as well. Man, all the folks over the years I almost 'turned off' from guns completely saying.."Hey man, wanna shoot my 44/45 ?" lol. The first hand gun my 'present wife of 41 years', ever fired was my SBH loaded hot. Well, we got married, but man was she mad! Ha. Warped sense of humor I know...! ;)

Gotta run right quick FB, maybe more later. Thanks for the story amigo !






CM
:horse:
 
#24 ·
The XP round has sharp hard copper edges that catch and cut into flesh and bone more so than softer less ridged lead bullets.

Note how the XP performs in this video compared to other rounds mentioned by 22plinkster.


View: https://youtu.be/WDvzul3rvTk
I've seen the Plinkster video and agree....in some applications the Extreme Penetrator or defender may be better. This is not yet proven in deep flesh though....to my knowledge with this bullet.

Don't misunderstand me though....I would be very comfortable carrying it in the back country, and sometimes do.
 
#18 ·
Sure, for the "average" shooter/cop anything more than .38SPL demanded "more" of them, as shooters. It required they develop a better handgun foundation handgun skillset to handle more recoil. However, we had some accomplished guys & gals who carried .357MAG, .41MAG, .44SPL/MAG and .45Colt/ACP revolvers and knew how to shoot them accurately, controllably and effectively.
As they say carry the most powerful gun you can shoot effectively.
 
#19 · (Edited)
Yeah, and just within the threshold of the entryway to that spectrum stands the .357MAG, and it's very young 2nd cousins, the 10mm and the .357SIG. These are the mid-bore, mid-range power calibers that begin to trod the realms of handgun calibers a little bit beyond the more common "service" calibers, being the venerable .38SPL, .38 Super, 9mm, .45ACP and now the .40 S&W. Of course, for defensive calibers only intended to protect against people and smaller feral animal threats the more common "service" calibers have usually been considered (by experience) to be "adequate enough".

A little further on from the upper range (heavy bullets) of the .357MAG, and the newer hotter 10's, stands the .41MAG, being kind of a bridge between the mid-range/mid-bore and the big-bore calibers ... and where the the real "balanced ballistics" handgun calibers begin, being the hotter .45Colt loads and the .44MAG.

After them stand the heavy hitter/hunting calibers, meaning the .454C, .460MAG, .500MAG, .480RUGER, .475 Linebaugh, .500 Linebaugh, which fall at the further end of the spectrum, some of which are virtually capable of being nicknamed monster hunter calibers, otherwise known as the older idea of "let's-stuff-a-rifle-cartridge-into-a-handgun-and-see-how-that-does" effort. ;)
 
#28 ·
I figure if the 10 is good with the people in Alaska it has to have something going for it. I understand the Alaskan state police carry it for possible use against bears.
Yep.

And while everyone's dog-piling on a 2-yr old thread, it's good to focus on current real-world usage of the 10mm AUTO on the big bruins.

That Denmark's Sirius Sledge Patrol soldiers carry a Glock 20 as their sidearm for defense against unexpected Polar bear attacks in the arctic regions of Greenland is pretty well known.

Then there are incidents in AK like this one:

https://www.ammoland.com/2019/10/al...stop-grizzly-bear-charge-with-glock-10mm-on-elmendorf-richardson/#axzz6GWKT1vcM

Image
 
#21 ·
The chief advantage of a properly loaded 10mm suitable for defense against dangerous animals isn't so much the virtues of the caliber, as that it can be chambered in a modern hi-cap semiauto pistol.

Sure, you can load a little heavier bullet weights than the modern heavy hunting loads made in .357MAG, and it's almost a millimeter wider in diameter.

The chief benefits are really that modern double stack pistols give the user more rounds available before loading is necessary, compared to a revolver, and the operation of the recoil operated locked breech pistol also aids in recoil management, which is handy with lightweight plastic pistols.

Of course, handloaders and handgun hunting enthusiasts who eagerly snap up the occasional short production runs of the S&W M610 revolvers would probably promote the advantages of the DA revolver, too. ;) That's a lot of weight to lug around on a belt for hours on end, though. Plastic is more convenient.
 
#27 ·
Good velocity penetration and power what's not to like.
Nothing. I am merely saying the penetration on deep flesh has not yet been proven compared to a conventional hard cast bullet. Those flutes may slow it down in flesh, which may be a good thing for tissue disruption but may impede penetration somewhat.

Some real world shootings on bear and / or moose would help. Like I said, I would still feel comfortable carrying it, and sometimes do,
 
#29 ·
Yep.

And while everyone's dog-piling on a 2-yr old thread, it's good to focus on current real-world usage of the 10mm AUTO on the big bruins.

That Denmark's Sirius Sledge Patrol soldiers carry a Glock 20 as their sidearm for defense against unexpected Polar bear attacks in the arctic regions of Greenland is pretty well known.

Then there are incidents in AK like this one:

https://www.ammoland.com/2019/10/al...stop-grizzly-bear-charge-with-glock-10mm-on-elmendorf-richardson/#axzz6GWKT1vcM

View attachment 716326

I think the 10 mm is underrated, it has less recoil and more rounds. In this case someone shooting a heavy recoiling .44 mag and up might not have been able to get that fast accurate second shot or third shot if needed.
 
#30 ·
Well, you could say the same thing for someone not being able to get off a 2nd or 3rd shot of 10mm (especially if a custom hot loading) fast enough, either.

Depends on the shooter.

I used to demonstrate that I could double tap targets faster than our average 9mm shooters (using a timer), and even hammer a pepper popper before it had started tipping from the first hit. That was with full power Magnum, too. Granted, it was easier to do with the Ported revolver than the non-ported one. ;)

It's always going to be shooter dependent.

Then again, the Freeze part of the Freeze, Flight or Fight hard-wired response may make it a moot point for anyone who doesn't train to react to nasty, surprise situations.

Sure, the same person, equally trained and practiced in shooting both Magnum revolvers and 10mm pistols is likely always going to realize an advantage shooting a recoil-operated Browning pistol design versus a DA revolver ... and the SA revolver guys are really behind the 8-Ball if they aren't using 2-hands, so their support hand thumb can roll their thumb-cocking for rapid shots.

Everything's a compromise ... even if you're a "fan".

There's even going to be the aficionados who want to "debate" whether someone can operate a 12GA pump shotgun w/slugs suitably "fast enough" as a 12GA Auto shotgun in some pants-dump situation.
 
#60 ·
Similar. I used to think the G-20 was perfect for me as a bow hunter in bear territory. Then a guide told me something like “a reciprocating slide has no place between a 500 lbs. angry animal and the ground” meaning the bear was on top of me. I understood what he meant.
I traded it for a S&W Mountain Gun in .44 mag.
I’ve owned several 10mm’s but they’re all gone now. I view it as a “jack of all trades but master of none” type cartridge.
Full disclosure, the guide carried a very short 870. But he didn’t have to carry a bow.


Sent from my iPhone using Tapatalk
 
#33 ·
Yes, but let's not pretend it doesn't also depend on the nature of the handgun.

Capacity aside, and even giving two competent shooters the same first-shot opportunity on a moving bear, the shooter armed with the heavy 5- or 6-shot magnum boat-anchor wheelgun will still be in recoil recovery while the shooter armed with a hot-loaded semi-auto G20 is sending a second or third shot into fur.

Again, that's as between equally competent shooters where time exists (a few seconds) to get off more than one shot.
Sounds like a challenge. I would love to see a Jerry Miculek video of this comparison.
 
#44 ·
Sounds like a challenge. I would love to see a Jerry Miculek video of this comparison.
Jerry Miculek? ... You're talking 'cream of the crop' with wheelguns.

I'm referring to two average shooters of roughly equally competence in marksmanship. One with the boat-anchor magnum revolver; the other with a G20.
 
#34 · (Edited)
Yes, but let's not pretend it doesn't also depend on the nature of the handgun.

Capacity aside, and even giving two competent shooters the same first-shot opportunity on a moving bear, the shooter armed with the heavy 5- or 6-shot magnum boat-anchor wheelgun will still be in recoil recovery while the shooter armed with a hot-loaded semi-auto G20 is sending a second or third shot into fur.

Again, that's as between equally competent shooters where time exists (a few seconds) to get off more than one shot.
Not pretending it doesn't depend on that nature of the handgun. :)

It's just that having used Magnum revolvers for so many years, with handloads and factory loads (including mild to wild), I've gained a little experience with what I can do with them. At least in the DA models, as the thumb-cocking SA's are always going to be slower than the trigger-cocking guns, even using the second hand's thumb to cock the hammer as the gun rolls back down. ;)

Granted, it's easier to use my 6 1/2" 629-4 Classic, which is ported, but even with my non-ported 5 1/2" Redhawk, while I'm no Jerry Miculek, I can run accurate splits (on paper or popper) in the .2+/- range using Magnum loads.

I can't do that with the last .500 I shot, even using middle-of-the-road bullet weight loads, but the .44MAG isn't that bad. We were taking video that day, while using assorted Demo guns, and since I was wearing a t-shirt you could see - in slow motion - the muscle tremors caused by the recoil running from my forearm, up through my upper arm, into my shoulder and then ending at my neck when the .500 was fired. (Not as bad as shooting a Freedom Arms .454 w/o shooting gloves, though. My hand hurt for a couple days after running a couple cylinder loads through that FA .454 w/o shooting gloves and with the factory wood stocks. Ugh.)
 
#35 ·
Yep.

And while everyone's dog-piling on a 2-yr old thread, it's good to focus on current real-world usage of the 10mm AUTO on the big bruins.

That Denmark's Sirius Sledge Patrol soldiers carry a Glock 20 as their sidearm for defense against unexpected Polar bear attacks in the arctic regions of Greenland is pretty well known.

Then there are incidents in AK like this one:

https://www.ammoland.com/2019/10/al...stop-grizzly-bear-charge-with-glock-10mm-on-elmendorf-richardson/#axzz6GWKT1vcM

View attachment 716326
Yet that does not mean it is the best tool for the job. It is what can be shot well enough, not because it is superior to a 44mag or 45colt or 500mag.
 
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#43 · (Edited)
:upeyes:

Actually it is the 'best tool' for their military job. It's an effective sidearm to have on their person while patroling and monitoring the Arctic regions of Greenland. On occasion they've had to deal with unexpected polar bear attacks. Sirius soldiers have stopped or turned charges with their 10mm G20s, so it's a proven combination - - -> gun + cartridge. It works.

Otherwise, they'd be issued something else for a sidearm.

https://www.guns.com/news/2019/11/06/glocks-m1917s-the-redoubtable-arms-of-the-greenland-patrol
 
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#47 · (Edited)
How fast is 'fast' enough?

Well, here's a dude who was smokin' fast in the '80s ...

Skip forward to the 0.59 sec. mark, and don't blink.

3-shot Mozambique Drill filmed IN REAL TIME
from concealed appendix draw:

View: https://m.youtube.com/watch?v=fXv8IepBVJQ
 
#49 ·
How fast is 'fast' enough?

Well, here's a dude who was smokin' fast in the '80s ...

Skip forward to the 0.59 sec. mark, and don't blink.

3-shot Mozambique Drill from concealed appendix draw:
...
I remember when that was first aired. I was the most impressed that competitive shooter Jim Zubiena could manage that draw and presentation while wearing those ill-fitting latex gloves of the time.
 
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#48 ·
I don't think we are talking about "average shooters" who are hunting the back country of Alaska or continental North America. We are talking about skilled marksmen who can take game in the field, often under severe or less than ideal shooting conditions.

So...if you guys want to take Jerry Miculek out of the equation (I still would like to see him perform this challenge), let's take it up a notch and talk about an experienced shooter / hunter /woodsman, and what he could do with either combination.

Someone said it earlier I believe, it depends on which platform one is most comfortable with.
 
#50 ·
I don't think we are talking about "average shooters" who are hunting the back country of Alaska or continental North America. We are talking about skilled marksmen who can take game in the field, often under severe or less than ideal shooting conditions.
First of all, those 'hunting the back country of AK' may be highly skilled with a rifle, but not necessarily so with a pistol. Many folks are better rifle shots than pistol shots, ... and vice versa.

But what about Joe Fisherman, who's casting off a river bank during the salmon run when Mr. Grizz shows up?

Is he a crack shot with a handgun, or just competent and average?
 
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#53 ·