How Many .22LR Does It Take To Go Through Bulletproof Glass?

22plinkster got a sheet of bullet proof glass and tests to see how many shots it takes to make it through. His first groupings were terrible due to a dirty barrel. Once it was cleaned out with some copper jacketed rounds, it took 64 shots with CCI Velocitors to make it through the glass and pop the balloon.

Nicholas C

Co-Founder of KRISSTALK forums, an owner’s support group and all things KRISS Vector related. Nick found his passion through competitive shooting while living in NY. He participates in USPSA and 3Gun. He loves all things that shoots and flashlights. Really really bright flashlights.

Any questions please email him at


  • Frank Young

    I guess 64 🙂

  • Beju

    The world may never know.

  • Michael R. Zupcak

    It’d be nice if there were a little more information on the type of “bulletproof” glass. How thick was it? What was it designed to stop?

  • That boy needs an American 180!

    • iksnilol

      Wonder if I could import an American 180 here in Norway (semi auto only of course)? Integrally suppress it, keep the length to 84 cm (a bit more than 33 inches) and it should be legal.

  • RealitiCzech

    Somehow I thought the answer would be 42.

    • Tucson_Jim

      That’s FUNNY !

  • DiverEngrSL17K

    Michael R. Zupcak has a very good and relevant point regarding the objective circumstances surrounding this issue. A follow-up article in greater detail would help put things in perspective.

    Having said this, we all know that “bulletproof’, “bullet-resistant” and other materials designed to resist immediate penetration by high-velocity projectiles generally may be able to do so for a given number of strikes, but virtually all such materials are vulnerable to cumulative degradation and penetration. The test in the article might have taken sixty-four rounds of .22LR CCI Velocitor, but I think that, without the extenuating circumstances of bullet spread ( from a dirty barrel ) and other related problems, the actual number of Velocitors needed to achieve final penetration in a given area of concentration would have been far fewer.

    Which brings me to the next point — in the real world, thare are several extenuating factors

  • iksnilol

    It would most likely require more bullets. Think about it, .17 caliber has higher velocity but also less mass. Only real advantage is that it is thinner.

  • Archie Montgomery

    Perhaps Plinkster might begin with the specifications for the “bullet proof” glass. At one point, ‘bullet proof’ glass was equivalent to a common 2×4 wood stud, fired through the thick dimension. (I don’t remember how big 2x4s were at the time.)

    This demonstration used .22 Velocitor ammunition. Perhaps a comparison to other type and weight bullets might be interesting. Could the bullet shape perhaps make a difference?

    Then, one is curious as to the effects of different velocities in the ‘experiment’. Perhaps a similar weight and construction bullet fired from a .22 Hornet at ‘Hornet’ velocities; then the same – or as near to it as possible – fired from a .223 Remington or 5.56 mm NATO?

    I must confess to being a bit curious about the range. Bullet resistant materials are normally intended as a defense against handguns at fairly close (indoor, usually) range. I understand the demonstrator’s stage name is 22 Plinkster, but the same test involving a 9×19 chambered pistol at three yards might be more appropriate.

  • Tucson_Jim

    Hmmmmmm… 30 rounds per second would be a useful rate of fire for a .22 LR Gatling gun… yes, it would have to have integral muzzle brakes and a motorcycle starter-motor to power it… but, this is why the ammo gods created the .50 BMG.