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Thread: Load choices for AR SBRs

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  1. #1
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    Load choices for AR SBRs

    And PDWs. Figured best to start ammo specific thread from the SOCOM PDW thread. Ammo manufacturers large and small are offering loads designed for those barrels in various calibers, and show excellent terminal ballistics at reduced velocities often produced from those platforms. Company that has done much development in thr SBR/PDW space, Maxim Defense also offers their own ammo, but I don't find any terminal ballistics testing to support the claim yet. If you know of more, post below.

    Federal Fusion soft points appear to perform well at under 1800fps for example. Clearly not as good as those traveling much higher velocities, but penetration and expansion was excellent. That's informal testing however, but:

    Last edited by WillBrink; 07-25-22 at 09:42.
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    Good discussion and recs from Hornady:

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    Big slow bullet for the caliber but impressive performance from 11.5." Not clear where that performance drops off as velocity drops on that rnd, that is, what the min velocity is for adequate penetration and expansion would be. I do know some Speer offering perform well as low as 1800fps, but have to find that rnd.

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    Perhaps not optimal, but the basic m855a1 from the 7.5" is no slouch either and a good choice if expecting to deal with BA I'd think:

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    Hornady 75 gr 5.56mm TAP from 8.1" SBR. I tend to doubt he was getting 2k FPS, but interesting effects. No doubt, Hornady would have more formal data:

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    Speaking of Underwood ammo, they make 223 that's designed to penetrate and expand at low velocities, as low as 1400fps apparently:



    From Underwood:

    https://www.youtube.com/watch?v=KxXfWTNoY7k&t=6s
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    Quote Originally Posted by WillBrink View Post
    I do know some Speer offering perform well as low as 1800fps, but have to find that rnd.
    62gr Fusion/Gold Dot. Fusion MSR would probably give you the best chance of good performance with that bullet.
    RLTW

    “What’s New” button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.

    Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.

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    Quote Originally Posted by 1168 View Post
    62gr Fusion/Gold Dot. Fusion MSR would probably give you the best chance of good performance with that bullet.
    I read similar and have a few mags loaded with that now.
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    I still have a bunch of the 64gr Gold Dots but it looks like those aren't made anymore.

    I'm not sure why, but Speer won't make a 5.56mm version. That would be clutch.

    I will probably run 69gr SMK handloads over max pressure once the GDs run out.
    Why do the loudest do the least?

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    Quote Originally Posted by Eurodriver View Post
    I still have a bunch of the 64gr Gold Dots but it looks like those aren't made anymore.

    I'm not sure why, but Speer won't make a 5.56mm version. That would be clutch.

    I will probably run 69gr SMK handloads over max pressure once the GDs run out.
    Odd they would stop producing them. Did they replace them with something else?
    - Will

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    “Those who do not view armed self defense as a basic human right, ignore the mass graves of those who died on their knees at the hands of tyrants.”

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