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Thread: Terminal effects of common 5.56 duty loads from a 10.5" barrel?

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    Member Galbraith's Avatar
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    Terminal effects of common 5.56 duty loads from a 10.5" barrel?

    I'm trying to get reliable information regarding the terminal effects of 5.56 duty loads(particular Speer 62gr Gold Dots) fired from a 10.5" barrel. This will be for multiple LE guns which need to be effective out to 200yrds, and my concern is that the barrels will not be optimal for these duty requirements. Any links to papers/research would be extremely appreciated.

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    I'm interested in seeing the responses as well. One of the officers in my squad used the 55gr GD load in a shooting last night.

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  3. #3
    Foppish Dandy Darth_Uno's Avatar
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    https://www.recoilweb.com/sbr-ammo-b...de-141394.html

    Not a big fan of Recoil but tests are tests.




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  4. #4
    Member the Schwartz's Avatar
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    Quote Originally Posted by Darth_Uno View Post
    https://www.recoilweb.com/sbr-ammo-b...de-141394.html

    Not a big fan of Recoil but tests are tests.
    I'd respectfully beg to differ.

    The author's commentary throughout the article suggests that 1.) he knows very little about the composition of the Clear Ballistics stuff (there's no silicon in it) that he is using to "test" the ammunition and 2.) that his understanding of the scientific method is more than a little lacking in that if one makes the direct observation that the test medium is an inaccurate one that proceeding with testing is likely to yield nothing but inapplicable results.

    In other words, garbage in (conducting tests with an unproven, uncorrelated medium); garbage out (obtain test data that applies only to the unproven, uncorrelated test medium). Ultimately, the test data obtained does not, and cannot, be used to predict the terminal performance of the ammunition being tested in anything other than the Clear Ballistics stuff.

    Mr. Curtis' article, at best, is a well-documented example of wasting time, energy, and money to obtain worthless test results and data.
    Last edited by the Schwartz; 08-10-2019 at 12:39 PM.
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  5. #5
    The Federal LE website states it will expand out to 200 yards with 10 inch barrels. My own tests on ClearBalistics gel with a 10.5 using 62 and 64 grain Gold Dot exhibited excellent expansion to about .50.

    https://le.vistaoutdoor.com/ammuniti...e/default.aspx
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  6. #6
    Site Supporter Clusterfrack's Avatar
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    Anyone have any data on the 75gr TAP SBR load?
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  7. #7
    Member the Schwartz's Avatar
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    Quote Originally Posted by Clusterfrack View Post
    Anyone have any data on the 75gr TAP SBR load?
    Here you go:

    http://www.hornadyle.com/products/ri...75-gr-bthp-tap

    Just hit the "Gelatins" tab near the bottom of the page.

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    Last edited by the Schwartz; 08-10-2019 at 10:39 PM.
    ''Politics is for the present, but an equation is for eternity.'' ―Albert Einstein

    Full disclosure as required by the Pistol-Forum CoC: I am the author of Quantitative Ammunition Selection. www.quantitativeammunitionselection.com

  8. #8
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    Thread on the 75 grain TAP SBR

    https://pistol-forum.com/showthread....load-yesterday

    You’ll also want to read Doc GKR’s stickies threads

    https://pistol-forum.com/showthread....-mm-Duty-Loads

    https://pistol-forum.com/showthread....mance-Thoughts

    Mechanical advantages aside, another reason to go with 11.5” barrels is thy are the new standard for federal LE Agencies (FBI, ICE, USBP, USSS etc) which opens up a lot more data.

    Bonded 62 grain softpoints from federal and Winchester and 62/64 grain gold dots are pretty much universal.
    Last edited by HCM; 08-10-2019 at 10:46 PM.

  9. #9
    Site Supporter Jay Cunningham's Avatar
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    Quote Originally Posted by Galbraith View Post
    I'm trying to get reliable information regarding the terminal effects of 5.56 duty loads(particular Speer 62gr Gold Dots) fired from a 10.5" barrel. This will be for multiple LE guns which need to be effective out to 200yrds, and my concern is that the barrels will not be optimal for these duty requirements. Any links to papers/research would be extremely appreciated.
    200 yards ain’t gonna cut it. Maybe 65/70 yards.

    But you may want to reconsider what you mean as “effective” on a 200 yard threat.

  10. #10
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    Quote Originally Posted by Galbraith View Post
    I'm trying to get reliable information regarding the terminal effects of 5.56 duty loads(particular Speer 62gr Gold Dots) fired from a 10.5" barrel. This will be for multiple LE guns which need to be effective out to 200yrds, and my concern is that the barrels will not be optimal for these duty requirements. Any links to papers/research would be extremely appreciated.
    How far out do y’all qualify ?

    We do 100 yards though we often have to simulate that stage with a half sized target. It seems most agencies only qual out to 50 yards.

    Are y’all running optics ? If so what optics ? RDS ? I ask because it is a lot easier to hit things at 200 than positively ID targets at 200 and positive ID is mandatory in CONUS LE work.

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