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AR15.COM
7/9/2026 7:03:50 PM EDT
Has there been any real world evidence of the stopping power of a Xtreme Defender type projectile?

7/9/2026 7:27:17 PM EDT
[#1]
Tagged for any answers.  I've been wondering this for awhile.  It's my funeral, but I've been carrying these in my micro and sub-compact carry guns for a few years.
The right to own weapons is the right to be free.
7/9/2026 8:09:40 PM EDT
[#2]
Quote History
Originally Posted By MoonDancer:
Tagged for any answers.  I've been wondering this for awhile.  It's my funeral, but I've been carrying these in my micro and sub-compact carry guns for a few years.
View Quote


I mean the velocity reports from short barrels, penetration, and all the non real world tests I've seen are mighty impressive.
7/9/2026 8:23:56 PM EDT
[#3]
I'm guessing there would be some lawsuits or court cases involving them.
It seems like something a lawyer would use to try and prove intent to kill.
7/9/2026 8:39:26 PM EDT
[#4]
Quote History
Originally Posted By Kokodude:
I'm guessing there would be some lawsuits or court cases involving them.
It seems like something a lawyer would use to try and prove intent to kill.
View Quote


Its either a justified shooting or it isn't. I've never bought into a good guy can have a justified self defense shooting but end up going to jail because he uses ammo that sounds mean.
7/11/2026 6:24:09 AM EDT
[#5]
Quote History
Originally Posted By Kokodude:
I'm guessing there would be some lawsuits or court cases involving them.
It seems like something a lawyer would use to try and prove intent to kill.
View Quote



In the Harold Fish trial, the facts that he used a 10mm handgun and hollow point bullets were brought up in his successful prosecution.
7/11/2026 10:12:32 AM EDT
[Last Edit: dmk0210][Edited] [#6]
Quote History
Originally Posted By sparkyfender2:In the Harold Fish trial, the facts that he used a 10mm handgun and hollow point bullets were brought up in his successful prosecution.
View Quote
There was a lot more to the prosecution and conviction than just ammunition selection.

https://www.thearmorylife.com/harold-fish-10mm-court-case/
7/11/2026 11:02:17 AM EDT
[Last Edit: dump1567][Edited] [#7]
I can't comment on the ammo you mentioned, but I just finished Bill Wilson's new book. And he carries the Lehigh Controlled Fracturing 9mm ammo.

I consider the Controlled Fracturing to be the ULTIMATE self-defense bullet and the 9mm 115 grain Controlled Fracturing is what I carry daily.
View Quote


He hunts & shoots deer or hogs every day on his ranch. And has done countless testing on these rounds. including taking hogs with it. It looks like good stuff, but at $2.50 a round, I'll stick to HST (which he's also a fan of).

9MM | 115GR, LEHIGH DEFENSE CF +P, 20/BOX
7/11/2026 11:05:41 AM EDT
[#8]
I'd like some insight as well. I have 500 xtreme defender .380acp rounds.
7/11/2026 12:34:52 PM EDT
[Last Edit: dmk0210][Edited] [#9]
Quote History
Originally Posted By dump1567:
I can't comment on the ammo you mentioned, but I just finished Bill Wilson's new book. And he carries the Lehigh Controlled Fracturing 9mm ammo.

He hunts & shoots deer or hogs every day on his ranch. And has done countless testing on these rounds. including taking hogs with it. It looks like good stuff, but at $2.50 a round, I'll stick to HST (which he's also a fan of).

9MM | 115GR, LEHIGH DEFENSE CF +P, 20/BOX
View Quote
Doesn't Bill Wilson own Lehigh?
7/11/2026 1:44:26 PM EDT
[#10]
Quote History
Originally Posted By dmk0210:
Doesn't Bill Wilson own Lehigh?
View Quote


Yep. If you go to that link, there's a video of a gel test he does with that ammo. Is he talking his book because he likes that ammo, you decide.
7/11/2026 9:56:27 PM EDT
[#11]
Quote History
Originally Posted By sparkyfender2:



In the Harold Fish trial, the facts that he used a 10mm handgun and hollow point bullets were brought up in his successful prosecution.
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By sparkyfender2:
Originally Posted By Kokodude:
I'm guessing there would be some lawsuits or court cases involving them.
It seems like something a lawyer would use to try and prove intent to kill.



In the Harold Fish trial, the facts that he used a 10mm handgun and hollow point bullets were brought up in his successful prosecution.


Should you find yourself charged in a self defense shooting you’re a fool to think they won’t use whatever they can to get a conviction.
You see that head come apart?
7/12/2026 3:34:58 PM EDT
[#12]
Very good track record with Pennington County Sheriff's Office and Rapid City PD in South Dakota.
7/13/2026 6:29:05 PM EDT
[#13]
Not the question you asked, but I run the 380 +p version in my LCP Max because HPs suck in 380.
There are too many good HPs in 9mm to warrant the extra cost of the XDs in that caliber, in my opinion.

Doesn't mean that much to me to mean that much to you.
7/13/2026 7:51:49 PM EDT
[#14]
Quote History
Originally Posted By swampvol:
Not the question you asked, but I run the 380 +p version in my LCP Max because HPs suck in 380.
There are too many good HPs in 9mm to warrant the extra cost of the XDs in that caliber, in my opinion.

View Quote


The Hornady .380 XTP, loaded by several companies including Hornady, consistently passes the FBI's penetration standards while also consistently expanding. I carry that in my LCP as does my son and his mother. I carried FMJ prior to the testing of the round.

Also, that Wilson ammo is a fragmenting round, which uses a completely different and more traditional  mechanism for wounding than the Xtreme Defender. We've successfully used fragmenting rounds in 5.56, and most every other rifle caliber for many decades.

The Extreme Defender, I'm not saying it doesn't work as advertised, but I just don't believe that they can cause real permanent wound cavities much larger than the bullet diameter at pistol velocities. I've seen the gel tests and the meat tests, but in the gel it's really a temporary wound channel with tears. In real game, it's shot placement that counts. IF the bullets were traveling over 2200fps I could believe it enough to use them. That's not going to happen with handgun bullets though because you'd have to reduce the weight so much to get to rifle velocities that you wouldn't have enough mass to penetrate any reasonable distance in most calibers.

I'm not saying they don't work, or that they don't do a bit more than a full metal jacket, but I'm yet to be sold that they do enough to replace a good hollow point like a Federal HST or Speer Gold Dot.
7/13/2026 11:05:31 PM EDT
[#15]
I only have those in 32 ACP for my Seecamp, since feed / fire 100% reliably there.  No terminal performsnce data though.
Brought to you by Carl's Jr.
7/14/2026 10:16:37 PM EDT
[#16]
FWIW, I like fluted ammunition, especially for being barrier blind.  Humans are 2/3rds covered in clothing and bone not to mention walls, glass, sheet metal.  JHP fails to expand 30% of the time.  However, at the end of the day it's still about shot placement, rounds on target, and then (ammunition) wound damage.

All the info below from previously posted in papers by Viper Weapon Training.  Some of it appears to be reposted in their website blog.  Also of note, I am just an amateur but have tried to educate myself.  Fluted ammunition is still found to be gimmicky in many circles and to your question, real world information is what is truly needed here -- and there is probably better or more recent information than what I have shared here that will push back on the solid copper rounds and I'd like to keep learning so hope it is shared.  In God we trust, everybody else bring data.

TERMINAL WOUND BALLISTICS
FOR HANDGUN AMMUNITION
BASIC LEVEL
BULLET TYPES AND
CHARACTERISTICS
2023 Version 3.0

SOLID METAL FLUID TRANSFER (FLUTED) SUMMARY


Solid metal fluid transfer (fluted) bullets are non-expanding. Their designed destructive
mechanism is contact tearing and fluid transfer. Since they are solid and don’t expand about the
only failure is tumbling which stops the designed fluid transfer. A tumbling round of this type will
create a substantially smaller wound diameter and also less deep penetration than a functional
projectile. As stated earlier some hollow points are made exclusively of copper but their design
(expansion) remains the same and those rounds are discussed in the hollow point section.

These non-deforming rounds are designed to use a specific technology to create a larger wound
cavity than FMJ or hollow point bullets. Tearing and hydraulic constriction, tissue redirection
(fluid transfer) are the two mechanisms used to create larger wounds. Because gel is non-
compressible and human tissue is compressible wound channels from these rounds are larger in
gel tests than in tissue tests. This makes the use of animal tissue in testing required because gel is
used not as a tissue simulant but rather a consistent media. With solid metal rounds, due to their
design use of constriction, testing in a non-compressible liquid (gel) creates unrealistically large
wound channels. If only gel was used then solid metal rounds would appear to be an order of
magnitude better than all hollow points.

Tissue is liquified by the bullet shock wave and by impact. The radial flutes increase liquified
tissue velocity because liquid is non-compressible. The flutes constrict the fluid described by the
Venturi Effect using Bernoulli’s Principle to increase velocity and direct the tissue outward to
impact and destroy adjacent tissue not being contacted by the projectile itself, increasing wound
diameter. With the increased velocity of the transfer fluid (castoff speed) almost four times higher
than static, the fluid impacting the adjacent tissue is fast enough to tear that tissue. This is fluid
transfer, not energy transfer. Many testers wondered if vectoring high speed liquified tissue
sideways into tissue would actually destroy that adjacent tissue that is not directly being impacted
by the projectile. Remember that a hollow point opens the same way. Hollow points do not open
because of friction, they open because tissue fills the hollow point cavity, gets crushed into a liquid
(instantaneous) and then pushes outward, tearing and bending the metal petals. Once the petals
are pushed outward the pressure is released and then friction takes over causing the continued
opening to complete the expansion. If liquified tissue can create a pressure to the point of tearing
and bending metal (hollow point) then higher speed liquified tissue can certainly destroy tissue.
For those who think this will only work in a non-compressible fluid like gel, it was confirmed that
this technology works extremely well in actual animal tissue with or without barriers. In every
tissue test and forensic report with these rounds the wound diameters far exceed the actual diameter
of the projectile.
Animal tissue tests confirmed that in over 200 shots the measured wound channel
was not only larger than that of an FMJ but in most cases was the largest wound channel produced
in that caliber compared to all other rounds to include fully functioning hollow points. Human
forensic exams conclusively show larger than caliber wound holes.

There are several main characteristics to the solid metal fluid transfer rounds performance….
Amount of liquified tissue (caliber), focus of that tissue into a jet, and pointed away from the bullet
(flute design) and velocity. The faster any solid metal round goes the larger the wound diameter.
We tested the same 9mm projectile in .380, standard pressure 9, 9+P, 9+P+ and the 357 Sig in
multiple tests in gel and tissue. That’s 5 of the exact same projectiles with the only difference
being velocity (pressure). The wound channel size always increased with velocity. Unlike hollow
points which are designed for a certain impact velocity to best perform as designed, solid metal
(fluted) rounds always work better when faster.

1. Penetration. All solid metal (fluted) rounds in all calibers tested penetrated 15 – 20 inches with
and without barriers.

2. Reliability and Consistency. Every single shot did roughly the same thing. There were few
recorded instances of tumbling, a 0% chance of failure to expand, and no chance to fragment.
These were the most reliable and consistent rounds tested at over 95% reliability.

3. Barrier Performance. The solid copper rounds and FMJs were the most barrier blind rounds
tested. Not only did barriers not deflect the round it didn’t change the wound diameter much and
only slightly reduced penetration depth. Solid metal barrier degradation was approximately 5%
vs light domestic barriers.

4. Permanent Wound Cavity. In the realistic animal tissue tests these rounds produced the largest
wound areas and with the incredible penetration depth exhibited in the gel tests they recorded the
largest overall PWC in all calibers. Data from the IWBA gelatin tests show results with enormous
wound diameters. The radial flutes work perfectly in fluid/gel. As noted, the PWC numbers are
inflated in the gel tests due to non-compressible gel, but the penetration depths are more realistic
to compare. Calculated PWCs in all medias and forensic reports are the largest ever recorded in
all calibers.

Overall, the solid metal fluid transfer (fluted) rounds are very impressive if deep consistent
penetration is desired. They exhibit great reliability and have the largest permanent wound cavity
of any of the five bullet types.
View Quote


Excerpts from 2020 Solid Copper/Hollow Point 9mm/.40 S&W Wound Ballistics Test...








7/15/2026 1:14:24 PM EDT
[#17]
It would be interesting to see a solid compilation of their use in real life but, good luck with that happening.
My take based on info available is that they are a step backwards for use in a revolver, or a semiauto that will reliably feed large meplat, slightly heavy for caliber hard cast.
They certainly penetrate much less that that type of bullet and appear to produce much smaller wound tracks in animals.

Where they shine IMO is they feed very reliably in semi's and give "better" penetration than expanding bullets if your target needs that. Given that any easy to carry sidearm involves multiple compromises I think they have a place, but it seems to be a pretty narrow place.
7/21/2026 1:29:50 PM EDT
[#18]
Lehigh Defense - Xtreme Defense vs Hollow-Point bullet through a Barrier. Here's what happened.



Just something from youtube....   I carry them,  and in my carry gun they shoot identical to my practice ammo
A question of etiquette... As i pass ..Do I give you the ass or the crotch..??

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