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300 BLK Accuracy Potential

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

Re: 300 BLK Accuracy Potential

Posted: Mon Oct 11, 2010 10:07 am
by 300Blk
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.

Re: 300 BLK Accuracy Potential

Posted: Mon Oct 11, 2010 10:08 am
by 300Blk
Try Berger flat base bullets and Sierra Game Kings for hand loads.

Re: 300 BLK Accuracy Potential

Posted: Mon Oct 11, 2010 10:17 am
by Dr.Phil
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.)

Re: 300 BLK Accuracy Potential

Posted: Mon Oct 11, 2010 10:25 am
by 300Blk
The 9 inch precision was the 220 SMK with a silencer.

Re: 300 BLK Accuracy Potential

Posted: Mon Oct 11, 2010 11:42 pm
by Blackwind
Sounds like the 16 is a great option beyond SBR lengths.

Re: 300 BLK Accuracy Potential

Posted: Tue Oct 12, 2010 9:13 am
by JasonAAC
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.

Re: 300 BLK Accuracy Potential

Posted: Tue Oct 12, 2010 2:56 pm
by Blackwind
Thanks for pointing that out Jason. I missed that the first time.

Re: 300 BLK Accuracy Potential

Posted: Mon Oct 18, 2010 9:21 pm
by 9mmkungfu
Sorry if this has been covered, but will using a 762SD-08 on a 9" 300 BLK invalidate your warranty?

Re: 300 BLK Accuracy Potential

Posted: Mon Oct 18, 2010 9:34 pm
by smcharchan
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