PolyCase Inceptor ARX

Tom Gomez and I are doing a comparative ballistic gel test with this ammunition (and three others), the results of which should be published in an article next month.  We are testing the 9mm version and doing four of the FBI tests.  So far we are definitely seeing some interesting results.

Nathan S also published a short pointer to some testing videos in an article this past April.

PolyCase Ammunition® introduces its revolutionary Inceptor® line of ammunition, featuring injection-molded metal-polymer bullets, including the ARX®. The Inceptor® line of ammo achieves reliability, pinpoint accuracy, and extreme performance through advanced technology and precision engineering.
From the research and development laboratory of PolyCase Ammunition, the flagship ARX® projectile represents the next generation of highly effective self-defense ammo, achieved through advanced design and materials science. Maximum energy is transferred to the target from the fluid dynamic effect produced by the bullet profile. By design, the ARX® harnesses the bullet’s forward momentum to pressurize and eject liquid target matter from the grooves on the bullet ogive. This effect results in stopping power and terminal performance that exceed many expanding handgun bullets.
The Inceptor® ARX® penetrates soft targets and barriers, including non-hardened 1/16” steel without deformation or degradation in terminal performance. Due to the bullet construction, the ARX® feeds like a round nose and achieves higher velocities than competing self-defense bullets, dynamically and efficiently delivering energy to targets.

This PR from PolyCase just came across my inbox and I thought I’d push a teaser for the upcoming article.


Frame capture from a GoPro showing cavitation through cloth layer (these are 6″x6″x16″ gel blocks)

You can find out more about the Inceptor ARX at http://www.polycaseammo.com/products/inceptor-arx

Tom is a former Navy Corpsman that spent some time bumbling around the deserts of Iraq with a Marine Recon unit, kicking in tent flaps and harassing sheep. Prior to that he was a paramedic somewhere in DFW, also doing some Executive Protection work between shifts. Now that those exciting days are behind him, he has embraced his inner “Warrior Hippie” and assaults 14er in his sandals and beard, or engages in rucking adventure challenges while consuming craft beer. To fund these adventures, he writes medical software and builds websites and mobile apps. His latest venture is as one of the founders of IronSights.com; a search engine for all things gun related. He hopes that his posts will help you find solid gear that will survive whatever you can throw at it–he is known (in certain circles) for his curse…ahem, ability…to find the breaking point of anything.


  • LG

    These are very nice up close and personal rounds with the 458 SOCOM. In the 458 SOCOM the accuracy, for me, drops off precipitously after 50 yards.

    • Dan

      Well that isn’t very good at all. Have you contacted the manufacturer about that? I realize thr .458 isn’t meant for long distance but having crappy accuracy beyond 50yds is unacceptable. Unless course you strictly use it for inside the home/yard use

  • Chappy

    Saw those in the store this weekend, $35 a box was a little rough

    • Kelly Jackson

      How many dollars per box is your life worth?

      • Cymond

        Are you implying that this ammo is so drastically superior to conventional hollowpoints that it’s the difference between life and death?

        And yes, sure, my life is worth a lot to me, but there is a very small chance I will ever need to defend myself with a fun, less chance of firing a short, and even less chance that a good hollowpoint is going to fail. So please excuse me if I don’t want to spend a fortune on something trust has, like, a 1 in 10,000 chance of ever happening. It would make more sense to spend that money on extra smoke detectors or healthier food or some other way to improve my safety.

    • sean

      your store is high and taking advantage! We have them for $24.99 a box and they are worth it

  • Sulaco

    Evolution of “Lehigh Defense” .380 xtreme (sic) penetrator?

    • Doc Rader

      We are testing those as well. They are a pretty solid round.

    • Giolli Joker

      Not really, similar but different.
      Lehigh bullets have rather standard weights and velocities, these are lighter and faster.
      The video review linked in the article compares the two.

    • thedonn007

      I need to get some in .380 ACP.

    • Marcus D.

      Lehighs come in 9 also, and probably other calibers in this same bullet design. Shootingthe Bull found the .380 to be a fantastic performer with no misfeeds, massive permanent wound channel, and perfect depth penetration to the FBI protocol. He found the 9 mm, however, to have massively overpenetrated, which is curious since and ad i got from Lehigh just today showed penetration to 17″ for its 9 mm offering. The said it was “new, ” but I did not check to see if there have been any changes to the round in the last six months.

      • Giolli Joker

        Lehigh website lists the 9mm with a 23″ penetration, that makes sense considering the “Xtreme penetrator” name.
        17″ is the listed penetration for the .380 offering.

  • PK

    Why so many blatant advertisement “articles” in the past few months?

    • Doc Rader

      Just a mix. We publish relevant press releases sent to us by manufacturers, and do larger reviews when we get items that warrant it.

    • Kelly Jackson

      I enjoy these articles, it’s exposure to products that I wouldn’t otherwise know about.

      • Dan

        Agreed. Even if I think the product is so f’ing ridiculous it is information I find useful to some degree

    • Some Guy

      I’d prefer the advertising to be blatant than it being the other way around. That being said the firearm media in general has some serious issues with failing to disclose conflicts of interest ie: if you get a gun for free for review purposes you ought to say so up front.

      • Doc Rader

        Ha! I wish we got free guns. We generally have a short turn around period on them.

        And most of the writers here do insert a disclaimer when we get comp’ed something of value. I don’t know about other media outlets though.

        • Some Guy

          Sure but even if you have to return it you may feel compelled to avoid negative criticism in order to secure future T&E products.

          Good that you provide a disclaimer but it needs to be standard practice and it isn’t.

          • Doc Rader

            I can honestly say I’m not going to give a positive review of a product I don’t believe deserves it. If we had an institutional policy of nerfing reviews, I wouldn’t write for TFB. Each review is actually checked before release by an editor and any negative experiences get a call and a discussion (and even the positive reviews we discuss prior to return of the item). And never have I been told to change a review because of some relationship we have with a company.

            By the same token I am not going to get on the bandwagon of giving a crappy review for a product just because they have a bad rep (I’m looking at you, Taurus haters… 🙂 ). I’ll review each product as a blank slate, (though it will always obviously be colored by my personal experiences).

      • PK

        That is a very fair point.

  • 6.5x55Swedish

    I’ve seen a lot of these + shaped bullets the last few years, anyone have an idea to how they work?

    • They are all inspired by the late Charlie Kelsey’s Devel projectile patent.

    • Micki

      When the bullet enters the body, the surrounding tissue flows into the cut-outs on the sides. The cut-outs, or flutes, finish at a relatively sharp angle, which then ejects the tissue in a radial pattern away from the bullet-track, causing yet more trauma. Hence, they’re sometimes known as “radially dynamic projectiles”. The old French THV (“Tres Haute Vitesse” = very high speed) bullets had a somewhat similar concept, but without the flutes. As you need a relatively high velocity to take advantage of the concept, the bullets tend to be lightweight.

      • 6.5x55Swedish


  • USMC03Vet

    I guess if you live behind enemy lines and are barred from owning hollow point ammunition and/or lead ammunition this would be good. Otherwise there is cheaper and better performing ammo than this.
    I hope the up coming tests are done with a 3 inch barrel.

  • Texas-Roll-Over

    I met all these guys as shot this year. Good group of guys trying to make something different and effective.

  • gunsandrockets

    I would think this light projectile would at least solve the problem the recoil sensitive have with the .40 S&W round.

  • MANG

    Interested to learn how these feed – I don’t quite buy that they ‘feed like a roudnose’. Suppose the grooved side of the bullet is the one that gets pushed up the feed ramp? I don’t know if the mode of failure would be a nosedive or what, but I bet not every feed ramp likes it.

    • CupAJoe

      I remember hearing something about Lehigh defense + shaped bullets not liking the offset kahr feedramp that makes their pistols so compact.

  • Broz

    From what I’ve seen on various YouTube sites, these things have far MORE penetration than conventional pistol rounds (HP). They seem to work as advertised in the trauma department, but dunno about over penetration being that good of a thing…unless you have plenty of empty/clear space behind your target (or a huge backstop)..I DO like the concept though…I forget who I saw test these (mebbe TN outdoors9 or Iraqveteran8888…can’t remember)