Light Weight subsonic Single Shot Loads

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mic2377
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Re: Light Weight subsonic Single Shot Loads

Post by mic2377 » Tue Apr 16, 2019 1:06 pm

Rifle used: AR-15 w/16" Noveske barrel
Barrel length/twist: 16", 1/7 twist, pistol gas
Bullet used: 110 V-max
Powder used: 4.0 grains of Alliant Red Dot
Case: reformed LC case by Rockey Brass, 1x fired
Primer: CCI-450
COAL: 2.085
Velocity: no chrono
Accuracy: 1.5" 5 shot groups at 50 yards w/Leupold VX-6 1-6x

I started at 5.1 grains of Red Dot and worked down. 4.1 grains and below was clearly subsonic. When fired through my Form 1 30 cal suppressor, it is RIDICULOUSLY quiet. A similar noise level (or lack there of!) to a suppressed 22 LR bolt gun w/subsonic ammo. All rounds fed from a standard PMAG, although obviously they required hand cycling of action.

I had originally wanted to use the 90 XTP's, but had some 110 V-max on hand to see if Red Dot worked well. I will be trying these next. I think if you are not seeking any expansion, any of the various flavors of 110 grain bullets will work fine with this recipe.

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Okiedelta
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Re: Light Weight subsonic Single Shot Loads

Post by Okiedelta » Wed May 15, 2019 11:43 pm

Why is it ‘obvious’ that they had to be hand cycled in a semi-auto gun? Sort of defeats the whole purpose doesn’t it?

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SwampDog_13
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Re: Light Weight subsonic Single Shot Loads

Post by SwampDog_13 » Thu May 16, 2019 5:00 am

Okiedelta wrote:
Wed May 15, 2019 11:43 pm
Why is it ‘obvious’ that they had to be hand cycled in a semi-auto gun? Sort of defeats the whole purpose doesn’t it?
Depends on what his purpose was. If he wanted as quiet as you can get, he nailed it.

Okiedelta
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Re: Light Weight subsonic Single Shot Loads

Post by Okiedelta » Sun May 19, 2019 6:26 pm

I guess so. I know this thread is ‘sub loads with single shot’ which I assumed to mean bolt rifle. I guess I missed the point. If gun functioning doesn’t matter on this quest, and all we are looking for is quiet, load that AR with just a case holding just enough powder to get the bullet to leave the barrel, maybe 100-200 FPS. That ought to be vewy vewy kwiet.

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