Ninja Assassin Ammo: Hornady .300 AAC 190gr Sub-X Subsonic Gel Test

by Andrew

Buy it at Ventura Munitions:
Hornady .300 AAC 190gr Sub-X Subsonic

We shoot Hornady .300 AAC 190gr Sub-X Subsonic ammunition from an upper with a 8″ 1:7″ twist barrel into Clearballistics ballistic gel to measure velocity, penetration, expansion/fragmentation, and retained weight.

Bare gel

Penetration: 17.2″
Retained weight: 178.6gr, 187.5gr
Max expansion: 0.598″, 0.767″
Min expansion: 0.379″, 0.395″

Heavy clothing

Penetration: 20.8″, 20.3″
Retained weight: 188.6gr, 189.1gr
Max expansion: 0.483″, 0.462″
Min expansion: 0.377″, 0.361″

Velocities in fps:
Average: 989.00
StdDev: 1.87
Min: 987
Max: 992
Spread: 5

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««« GUNS IN THIS VIDEO »»» upper with a 8″ 1:7″ twist barrel on RRA lower

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Andrew is a combat veteran of OEF and has performed hundreds of ballistic tests for his YouTube channel, The Chopping Block ( He is an avid firearm collector and competitor and lives with his family in Arizona. If you have any questions, you may email him at

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11 of 47 comments
  • M Bear M Bear on Jun 19, 2018

    Subsonic rifle ammunition is stupid and pointless for civilian and LEO use. Full stop. The only point to subsonic suppressed rifle rounds is for sentry elimination on covert military operations. If you're a civilian or a cop, repeat after me; "I AM NOT A SPECOPS WARFIGHTER. I WILL NOT DO BALLISTICALLY STUPID S*** WITH MY RIFLE."

    Why the hell would I want to turn my rifle into a gigantic pistol? I have a handgun for that. Jesus Christ people...

    • See 7 previous
    • Justin Roney Justin Roney on Jun 20, 2018

      @M Bear Suppressed hog hunting within 150 yards at night in Texas, that’s why. It works great for that purpose.

  • Mike Mike on Jun 19, 2018

    Is this round good for small deer?
    How quiet is it unsuppressed?
    If it is only as good as a 45ACP why not just go back to the De Lisle Carbine (which has a large COOL factor) Or a pistol caliber bolt action rifle (Ruger range rifle would be great)

    • David S David S on Jun 19, 2018

      @Mike In subsonic form it is unacceptable for small deer, in supersonic form it is marginal.