.300 AAC BLACKOUT High Speed Gel Video

Brass Fetcher Ballistic Testing & SilencerTalk.com made this video showing a .300 AAC BLK being fired into 20% gel.

Note the difference of performance between the two different bullets. The lighter (and I presume faster) hollow point in the second clip creates a lot more trauma when its hits the target and has much lower penetration than the Remington AccuTip-V.



Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


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  • Jim

    It’s hard to tell, but does that second round have insufficient penetration given the FBI guidelines?

  • Vitor

    I found the AccuTip more impressive, it really made the gel block jump. And I’m sure it would leave a big exit hole.

  • JonMac

    Very cool video, but you can’t really judge the relative effectiveness of each bullet, just on the apparent size of the temporary cavity while it’s still, erm, cavitating.

  • Lance

    Looks awesome!

  • JonMac

    Turns out Brassfetcher have written up these tests;

    http://www.brassfetcher.com/300AACBlackout06OCT2010.pdf

    If you average the three shots for each of the two rounds shown in the video, you get 4.3″ max diameter for the temporary cavity for the Remington AccuTip, and 4.5″ for the Sierra Pro Hunter HP. Not much difference.

    Note however that temporary cavity is not widely regarded as bringing anything to the table as regards incapacitation, as handgun bullets rely only on the permanent cavity – the diameter of which doesn’t seem to have been measured in these tests.

  • ChuckE

    This post is confusing. It appears that the 110 grain bullet dumped more of its energy in the gel, and that the 125 grain bullet actually penetrated more. It is impressive that the gel jumped with the larger bullet, but it appears that the 110 grain bullet created a larger permanent cavity – but the gel is still moving when both segments stop.

  • Flounder

    20% gel? Just want to be clear Steve. I thought most ballistics tests were done in 10% gel.