.40s&w vs 10mm for Woods Defense 200gr Underwood Hardcast

How would the 40 super hardcast work against brown bear 🐻?

The .40 wins for a bear round.

Big difference in carrying a 40 to 10 mm but both pack a punch just 10 is a hotter round….

150-GRAIN BULLET IS STILL A 150-GRAIN NO MATTER WHAT WEAPON, 200-GR. THE BRAND of weapon DOES NOT MATTER.

I don’t understand what this video shows at all what that one bullet is faster than the other who cares let’s see penetration

Glock doesn’t recommend the hardcast through stock barrel’s, what your take , the coating making it okay?

the difference between performance of the 2 rounds here and pretty well moot. I think any 10 mm loaded to it's full potential would certainly beat any 40 but the thing is more than half factory loaded 10 mm rounds struggle to stay on par with and sometimes even falling short of most common factory loaded 40 rounds in both chronograph and gel tests. This could be why and understandably so some claim a 10mm on average is not better than a 40

Honestly, any hard cast is viable as a woods defense cartridge. .380 ACP hard cast has more penetration than a .44 Mag 240gr JHP, which is highly regarded as a bear round AFAIK.

Do those sharp shouldered rounds cause feeding issues?

Underwood reduced the load in the 200gr Hardcast .
8.6 of Longshot to 8.4 Longshot in the 200gr Hardcast in 10mm.
My Handload 8.8 of LS with 200gr Hardcast FNGC in G20/kKM I get my 1250FPS. I don’t think the Underwood Hardcast is 20 to 22 BHN it’s more like Acme Bullets 16 BHN.

If you have a 10mm.why a 40 ?

LOL.... so all of a sudden ammo makers are seeing that...........Cast and coated bullets......penetrate? Been casting for 50+ years... coating for 10+ years. When writing to gun magazines or ammo makers I was told... there was no use for cast and coated bullets and they would not even consider them. Kinda bittersweet to me that they are finally doing it.

Oh... glock? seriously? best to simply avoid them for situations where you might have to (gasp!) point shoot in a hurry.. Pretty much everything else is fine. Don't belive me? use a laser or whatever and point shoot a normal grip angle and a glock side by side.

Now i have live and Backpack in Michigan Arizona &Texas no big bears i have carried a Browning Hi Power in 40 S&W back up with a 12 GA Mossberg then i have carried Ruger Blackhawk in 45 ACP / 45 LC and S&W Model 610 10 MM to Colt 1911A1 45 ACP over the years .

Moving to NorCal Redwood forest area. Finding a 10mm for woods carry black bear is tough. So maybe .40 S&W +P is enough for black bear & mountain lion…?

Buffalo Bore has some .40 S&W +P they claim makes over 600+ ft/lbs. That good enough for black bear?

You talk about 40 Smith and Wesson being “high-pressure“. In fact, 40 and 9 mm have the same exact case pressures at 36,000 psi. Do you realize that 10 mm (44,000 psi) is much much higher pressure than 40 or 9mm? Maybe math works different in Alaska. Lol.

So the 40 penetrated slightly more & had better weight retention than the 10mm... the 40 more than held it's own in this comparison.

If I could add to the conversation a bit. I have seen many chronograph tests of 40 S&W and the 10mm over the years. The 10mm in it's original form was closer to the 41 magnum in power levels. So, yes it is more powerful, but not always. The FBI in it's testing and adoption of the 10mm asked the ammo makers to adjust down the power levels for the agents who could not handle full power 10mm. This is the reason behind the 40 S&W, S&W was building the pistols for the FBI, out of there concern that some agents would buy full power over the counter ammo, they were working with Federal to make the original 180gr. hydroshock for their carry ammo and they were asking how Smith could help make sure their agents could not use the more powerful rounds. Smiths answer was to cut the case down a but to 9mm length.
Even today, if you use Federal 180 hydroshock ammo, the 40 S&W and the 10mm are almost identical.
My point here is, if you carry a 10mm for large game, you need to check that it is full power and not downloaded.
BTW, the best performance I have seen so far for the 40S&W is the Federal Hydroshock, but I here Buffalo ammo makes a 40 S&W +P, but I have not seen anyone test it yet.

We need to write the ammunition manufacturers asking for the test barrel length what's the ballistic out of the optimum barrel length what's the velocity out of a 3 inch barrel 4 inch what accessory except for the outcome for a 40 Smith and Wesson is a 5.5 inch barrel

The 40 works just fine so does the old 45 ACP 357 hardcast 45 hardcast a friend of mine loaded me some 250 grain flying ashtray hollow points for a 45 doing over 1,200 ft a second how do I know when I shot a cinder block with it turned it into damn gravel Seattle 357 Hot load with the same thing just knock the chunk out of it shot a 9 mm app bounced back and hit me in the balls the 9mm wasn't hardcast it was FMJ

Both are amazing rounds but I'm sticking with the 40

This video proves that you can get it done with 40. Remember you’re gonna have a more than just one round

This will suffice for the the dogman we have here in Ky, thanks for the video bro

You are probably safer shooting .40 out of a 10mm Glock than shooting .40 out of the .40 cal Glock.

The theory I have seen presented is, it’s not the ammo causing the kabooms. Because Glock has loose tolerances, there is a chance for the cartridge to go to far into the chamber and the mouth of the case goes past the end of the chamber into the leade. When the round is fired, the brass isn’t allowed to expand and release the bullet until they pressure builds far enough to rip the sliver of brass off the mouth of the case. Sometimes there is enough pressure to blow the back of the case out, blow the mag release out, bend the slide or other damage.

It is often blamed on the ammo, but sometimes you find the little circle of brass that war ripped off the mouth of the case. Most people don’t look for it.

I have seen 2 Glock kabooms. One was a brand new 17 on its first trip to the range shooting factory ammo. The other was an old 22 shooting reloads. The 17 was locked up, but after we got the blown out case removed, it was good to go. The 22 was destroyed. Cracked frame and bent slide.

Federal makes a great 200gr. 40sw. Hardcast.

I carry a g29 10mm for camping. I live and camp in the mountains of Southern California. We have mtn lions and black bears. My 29 is bulky and heavy on my waist, and I rarely want to wear pants with a belt loop. I'm thinking about going to a .40 cal, smaller, lighter gun and use hot rounds. And carry it with a belly band.

This just proves that hotroding the 10mm isn't necessary for adequate performance. 200gr at 1,100fps is about the sweet spot. However, 100fps up or down isn't going to make any significant real world difference.

very interesting results. 10mm might cause greater hydrostatic damage (larger initial wound channel) but .40 SW retained more weight and penetrated as well. curious to know why you guys have seemingly abandoned revolvers like .454 Casull, .44 Mag, .480 Ruger and other big bores

I'll take lehigh extreme perpetrator. They don't expand.

10mm ftw

40 S&W will work on ANYTHING, grizzlies included. Saying 40 isnt enough is what people who DONT KNOW much about ballistics say.

Federal premium 40 s&w hard cast or the Underwood?
For north Dakota/Montana backwoods. Standard carry currently is hornady 175g critical duty.

Dang...i love Crystal Geyser...and .40 S&W

The same people that say 10 mm almost the same as 40 S&W are the same people that say 9 mm plus P plus is the same as 357 Magnum, and 38 Special out of a snub nose is just about the same as 357 out of a snub nose you really can't make this stuff up😂

You need to lose weight my guy. A lot.

The most important thing is shot placement.

Will the 40 work against black bears no grizzlies in Pennsylvania

looks like the 40 out performed the 10 lol

The bullets seem soft. Why so much weight loss and flattening? Is that normal for a hardcast?

Worse comparison video i ever saw

Do 10mm Glocks have unsupported chambers still?

You can find the video with the 40 Smith against 10 mm Buffalo bore the 10 mm is 200 ft per second faster the bullet weight was the same they stopped exactly the same place in the jail exactly the same place

Huh

I used to carry a 10mm in my Cumberland Mountains but after watching several if these 10mm vs 40 gel penetration tests I have switched to a more slender/lighter 40 S&W and I dont feel undergunned for Black bear

40 Short&Weak. LoL. The dandy boy caliber

40? 40??? Lol. Get a 10 a shoot the proper loading. :)

N

Great Vid!!!🤟❤👍 I just started reloading 40 S&W 200 Grain Hardcast with Starline brass to 1375 fps on the chronograph thats 840 fpe out of my Taurus PT 24/7 G2 40cal 3.5 Compact( 15+1) with kkm barrel and upgraded recoil spring. Its my woods gun /ammo when camping in high country.

I am hearing that a lot of 10 mm are being downloaded closer to 40 Smith & Wesson pressures