300 BLK Accuracy Potential

Discussion about rifles in 300 AAC BLACKOUT (7.62x35mm), hosted by the creator of the cartridge.

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Dr.Phil
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300 BLK Accuracy Potential

Post by Dr.Phil » Mon Oct 11, 2010 9:54 am

Since it has been stated that the most efficent barrel length for a 300 BLK (SS) is 9",
what is the accuracy potential for the 300 BLK in this barrel length?
What was the best accuracy that you have encountered out of a short barrel in either 300 BLK, 300 / 221 Fireball, or "300 Whisper(R)"?

Would 1 MOA accuracy out to 400 yards be possible with quality hand loads?
If so, this would make the 9" upper setup a formitable platform for a multi-role weapons system.
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300Blk
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Re: 300 BLK Accuracy Potential

Post by 300Blk » Mon Oct 11, 2010 10:07 am

The 9 inch precision is in the spec sheet. This was generated from 175 rounds fired from 7 uppers (25 rounds each) with no flyers subtracted and was at 100 meters.

With the 16 inch Model 7 light barrel, we did 10 groups of 5 rounds each with the 155 ammo and it was 0.8 MOA average. That is not a BS 3 shot group picked out of several. No discarded rounds. No flyers. No BS.

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300Blk
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Re: 300 BLK Accuracy Potential

Post by 300Blk » Mon Oct 11, 2010 10:08 am

Try Berger flat base bullets and Sierra Game Kings for hand loads.

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Dr.Phil
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Re: 300 BLK Accuracy Potential

Post by Dr.Phil » Mon Oct 11, 2010 10:17 am

Did you happen to test the 220 SMK load?

Thanks for posting the test results.
I was hoping that was the case.
Having the 9" as a PDW platform only would be a waste.

My build is going to be whatever Noveske puts out as their SBR length barrel coupled with the PRI Full Length Forearm & ARMS 38 SPR-PEQ-2 Sleeve so that my TBAC 30P-1 is recessed into the hand guard.
(Should look like a Mk12 Mod0 and an MP5SD had a baby.)
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Re: 300 BLK Accuracy Potential

Post by 300Blk » Mon Oct 11, 2010 10:25 am

The 9 inch precision was the 220 SMK with a silencer.

Blackwind
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Re: 300 BLK Accuracy Potential

Post by Blackwind » Mon Oct 11, 2010 11:42 pm

Sounds like the 16 is a great option beyond SBR lengths.

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JasonAAC
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Re: 300 BLK Accuracy Potential

Post by JasonAAC » Tue Oct 12, 2010 9:13 am

Blackwind wrote:Sounds like the 16 is a great option beyond SBR lengths.
the 16" Robert is talking about above is the one for a Remington 700/Model-7. but, yes, the round performs very well from a non-sbr barrel too.
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Re: 300 BLK Accuracy Potential

Post by Blackwind » Tue Oct 12, 2010 2:56 pm

Thanks for pointing that out Jason. I missed that the first time.

9mmkungfu
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Re: 300 BLK Accuracy Potential

Post by 9mmkungfu » Mon Oct 18, 2010 9:21 pm

Sorry if this has been covered, but will using a 762SD-08 on a 9" 300 BLK invalidate your warranty?

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smcharchan
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Re: 300 BLK Accuracy Potential

Post by smcharchan » Mon Oct 18, 2010 9:34 pm

9mmkungfu wrote:Sorry if this has been covered, but will using a 762SD-08 on a 9" 300 BLK invalidate your warranty?
Discussed here:
http://www.silencertalk.com/forum/viewt ... 86&t=62885

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