AMMO TEST: 10mm Underwood 200 Gr Hornady XTP JHP




What do you think about this video?

JayzBeerz: I still prefer .45 ACP Federal HST. 

Bogs Craig: so, which one is the best hand carry self defence gun?

James Nesta: The terminal ballistics of this round look similar to the performance of the .45 acp +p 200 & 230 gr. XTP Hornady loads. Aside from the benefit of greater ammo capacity in the G20 vs a .45 1911, I can't see a compelling improvement in terminal ballistic performance in the 10mm G20 vs the .45 acp +p 1911. The greater kinetic energy of the 10mm here may be producing a larger temporary cavity, but not much more in the way of an effective wounding effect - the permanent cavity. My belief is that we have yet to see an expanding bullet that has been optimized to convert the kinetic energy of the 10mm into more extensive destruction of tissue in the target.

James Nesta: It looks as if Underwood is driving the XTP bullet beyond its design speeds and causing excessive expansion and fragmentation. I would love to see the XTP bullet in a full-power 10mm load with more limited expansion and more penetration. 

ediot6969: I have a glock 20c but I got a kkm 6" barrel and my velocity was 100 fps faster than what Got in this testing which means anything from human to a 1500 lb bear is going down easy. 

MarvelousSeven: This is really the only 10mm JHP brand I buy any more.

dhamilton201: in response to E.W.E. Hughes Jr. and Bob Cobb I will have to second what Bob says ....You really dont have a clue!!

blackwerk: @ me2ontube imagine that small bullet weighing 706 pounds. now simply lay that small 706 pound bullet on your chest. The weight of that very small but now extremely heavy bullet will penetrate your chest from the weight alone 706 ft/lbs of energy. hope this helps...

tnoutdoors9: Probably 180 gr.

12799MaDeuce: Would make a good winter carry load

savagejo6661: Sorry, that's a Weatherby PA-459......THANKS!!!

RockGIV: Hey TN just thought I should let you know that I bought a box of .40 S&W a couple months ago, but when I recently went to test it out I found that inside the box that was marked .40 S&W +P there was 10mm!! and it didn't even have gold dot bullets in the rounds! I have tried to contact Underwood but they are expieriencing a "high volume of calls" and have gotten back to me yet. No need to say I am now kind of worried about thier Quality Control.

mrwangchung: Underwood loads some good stuff, it's my carry ammo.

E.W.E. Hughes Jr: IMO the 10 MM round seems to be a tweener that doesn't really do any one thing well. The .40 or .357 SIG is more than adequate for self defense, and .44 Magnum seems like it's a better hunting round. 10 MM seem relegated to bear defense.

KYpatriotism: I'm not trying to take away from you tnoutdoors, but in my opinion I usually hunt medium game, white tail deer hogs, with a .260. I know of many people who use a .223 which is sufficient to. Remember the size and power of a bullet is usually never the complete and main factor in taking game It almost always has to coincide with bullet placement unless you were using a .50 BMG or similar cartridge in which you shoot it in the leg and it takes its shoulder off. But the lowest I would use is a .223

JONYAG07: the .38 special is also shorter than the .357 Mag yet u can fire a 38 in a revolver chambered for .38 Special... The problem is not firing the bullet into the chamber, but firing a cartridge that is not headspacing (It can't reach the chamber's shoulder)- simply held in place by the extractor.

MagicCat3: Energy Dump (adj.) To expel all of ones energy at once in a single quantified location. Thus having the bullet not leave the body cavity.

Bill Kunert: Have you done gel test using win white box. 40 180gr jhp?

chopinbloc: Sure. Once. I'm kidding, of course. People have done it but it's not a good idea because the cartridge headspaces on the case mouth.

KYpatriotism: This might be hard to believe but my local outdoor and firearms store had the cheapest price for all and any ammo anywhere I've been including the internet until the introduction of gun control legislation, it is still inflated but only slightly above internet prices and much cheaper than other local places. It is still cheaper to buy from their if you factor in the shipping you would incur on the internet unless I was buying thousands rounds in bulk. I'm usually a weekly ammo buyer..

eromusofwom: Huh? Every bullet is designed to kill. A .45 ACP bullet at slower velocities will actually expand to a wider diameter and potentially cause even more damage to vital organs. What do you base this ridiculous opinion on?

jigsaw183 .: Thank goodness you are back up and running. Your videos are awesome.

GarnetGoldGunner: TN!! Get your hands on some Black Talons!

Hernandez048: What do you guys hunt with a 10mm? Other than things that bump in the night ofcourse.

Ohio10mmFan: Thanks for another great 10mm test. I load this bullet to 1150 fps over some Longshot as a deer/medium game load. After seeing your test I think this would work and would now consider it for HD use as well. I am planning on pulling some 180gr Ranger T Bonded bullets for load development for the 10mm. We'll see how that works out.

MrWhitetailtracker: Well a BB could to if it hit you right but let's be realistic Tiggerman323

xtremearmor: Outstanding video. The bullet had very nice expansion and the penetration was spot on too. You brought up some very interesting points about the velocity of this ammo too. Very well done!

fivefoflow: Who said anything about hunting?

David T: I've been watching your videos for a while and I think they're great! I think we'd enjoy seeing a 155 gr all copper barnes loaded in 10mm by buffalo bore. Please throw that bad boy into some sim test.

chopinbloc: No it's not. Not even close. It's roughly equal to .357 mag in terms of energy. 10mm can push the heavier bullets just a little faster than .357 can push the same bullets. 10mm is well short of .41 mag and this rumor needs to die. Anyone with double digit IQ and just barely literate can pick up a reloading manual and see that 10mm is nowhere near .41 mag.

MrWhitetailtracker: This would put a bad guy on the carpet in a hurry.

W. Tinnen: Ha ha ha, and A LOT lighter than a shotgun! I'll look in to that bear spray again then (it has been a couple years since I've checked them out). Yes, the 2 legged threats. You've given me some good ideas--bear spray and a Glock; but something smaller, like a 26. I can leave Mossy at home. Thanks again.

mememojo: can 10mm be called .40s&w magnum

Luis Postgate: To bad the government plans to take all of this away from us

Southern Shooter 86: Federal 9BPLE.....

Oh Kay: Every bullet is designed to kill. However, wound channel size is so similar between the .45 and the 10mm (10mm is a super hot .40SW), that the next factor is power. The 10mm is dumping massive FT-LBS of power into the target. There will be more surrounding tissue damage and collapsed tissue/veins/artery from the pressure than the .45. I love both, I carry either an XDm .45 or a G20SF

dragonballjiujitsu: I would never consider this load for self defense. This is a good hunting load for black bear or deer maybe but way too much penetration for street. My comfort zone as you say is around 9-10". Anything more is going to zip right through the human body and kill who ever is behind them.

Scott M: at 2:12-2:13. was that steam from between the denim and block? ver interesting phenomenom...

tnoutdoors9: Just one shot. I don't want to risk "crossing the streams", although there might be tests where I take multiple shots.

jebaki: Well usually XTP bullets are tougher and have better penetration than the Gold Dot...

Adam lancaster: already ditched the clear gel ?

jim vandemoter: Forgive my ignorance, but what is iwba?

4949shooter: TNoutdoors, Great test and than you. I think there have been many of us 10mm fanatics waiting to see this load tested. I was a little surprised by the outcome, as I think many will be. Question...when you say this is a "crap shoot," do you mean as far as performance of the ammo on a given day / target, or do you by which load you choose to carry? Thanks, 49

HighAsCaptnKirk: Thx for these vids! We know there a lot of work and see a dr about that ankle if it still hurts!

Michael Chapman: Underwood 40 cal. 180 grain test gun glock 22 please!!!!

tonydelacruz45: Did you see the video of those hunters shooting a deer with 10mm? It dropped dead with 2 shots. I have heard of people shooting deer with rifles 3 times before they dropped.

Just the Facts: Spend a few extra bucks and get a Storm Lake or KKM... far superior to the LW.

TaloHawkX111: Tnoutdoors9, keep up the good work. You're helping me out a lot on data points for ammo. I'd like to see more ammo tests in 10mm. Perhaps a Hornady Critical defense in 10mm?

Fitchgerald Wynn: thanks

ColtDeltaElite10mm: Excellent!

Rating:
AMMO TEST: 10mm Underwood 200 gr Hornady XTP JHP 5 out of 5

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