I tossed together a SPR in 6.5 Grendel / .264 LBC. Blackhole barrel.

Discussion in 'Rifle Discussion' started by BiggerHammer, Oct 18, 2014.

  1. BiggerHammer

    BiggerHammer
    Deep in the Pacific Northwest.
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    This Blackhole barrel flat shoots!!!!

    Just finished building a SPR with a Blackhole Weaponry 8 twist, SPR contour. In .264 LBC. I am more than pleased with the barrel. I fired 9 rounds on the new barrel to adjust the gas block, check for function and get on paper, then scrubbed the bore with Butches Bore Shine and went for my first 5 shot group. This was rounds 10-14 on the new barrel. Shot at 130 yards from the prone in the dirt with a bipod and rear bag.

    The cold clean bore shot was almost exactly 1 MOA high, the next four stacked up for a group of .284 for four shots!

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    I had the upper, lower, handguard and buffer tube Cerakoted in a burnt bronze/ graphite black mix.

    SNS lower
    Mega heavy billet upper
    Fortis "Red" muzzle brake
    Battle Tested Equipment adjustable gas block
    BlacHole Weaponry 18" , SPR contour, 8 twist barrel. Threaded 5/8-24
    14" Fortis Rev handguard
    Noveske key-mod rail panels
    Mega grip
    MagPul ACS-L stock
    Rock River two stage match trigger
    NIB bolt carrier
    Type I bolt

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    Steve M, kev350, mjbskwim and 2 others like this.
  2. IronMonster

    IronMonster
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    Very nice.
     
  3. spectra

    spectra
    The Couve
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    Yeah that sure looks like you tossed it together:D Nice looking setup!
     
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  4. IronMonster

    IronMonster
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    What was your reasoning for choosing the 6.5 over the 6.8 SPCII? I have been thinking about branching out into a larger bore AR and have been leaning towards the 6.8 but it really seems to be a tough call.
     
  5. Lance Jacobs

    Lance Jacobs
    South Willamette Valley Oregon
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    The 6.5 Grendel definitely has an edge over the 6.8 SPCII. The Grendel shoots flatter, as it has much high ballistic coefficient bullets available, when one compares similar bullet weights.

    This 123 gr Hornady AMAX that BiggerHammer is shooting has a whopping ballistic coefficient of .510 ! Hornady's 120 gr SST bullet for the 6.8mm SPCII has a BC of .400
     
  6. Lance Jacobs

    Lance Jacobs
    South Willamette Valley Oregon
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    I must say that is really one quality AR. You have selected your components wisely.

    Congratulations on owning such a fine rifle!
     
  7. Will_Power

    Will_Power
    OR via OK
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    This is reeeeeally not helping my growing want for a 6.5 G. Thanks a lot.
     
  8. BiggerHammer

    BiggerHammer
    Deep in the Pacific Northwest.
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    Thank you. As mentioned before, I went with the Grendel due to the bullet selection and B.C's. I currently have a 24" , 8 twist bull barrel profile in the works for a heavy AR build. This will be a dedicated long range Rockchuck/Groundhog rifle. I'm leaning towards "Sniper Grey" Cerakote and all black furniture.
     
  9. 2Wheels4Ever

    2Wheels4Ever
    Central Oregon
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    Nice looking gun. That upper is definitely different.
     
  10. erudne

    erudne
    The Pie Matrix
    PPL Say Sleeping W/Your Rifle Is A bad Thing?

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    Only thing wrong with that rifle is that it is not in my safe!:cool:
     
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  11. Reno911

    Reno911
    Hillsboro
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    B E A Utiful. I've been thinking about a 6.5G to deer hunt with. Just haven't made the plunge yet.
     
  12. Mr Smith

    Mr Smith
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    Great looking rifle!

    My buddy is building a .450 bushmaster for hunting with. Absolutely love how flexible the AR platform has become, and how it continues to evolve and expand. Would love to see more calibers get some standardization going between manufactures.
     
  13. BiggerHammer

    BiggerHammer
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    This is one outstanding barrel! I decided to try some 130gr Nosler Accubonds and some 129gr Hornady SST's. I wanted to see how the 8 twist barrel shot them, due to the fact I have a much longer, heavier 8 twist in the same chambering on the way from BlackHole. I can get more velocity out of the heavies in the longer barrel.

    I loaded both bullets with the same charge of BL-(2). The group bellow was shot rather informally. From the prone with a bipod, in the dirt with a rear bag. When I took the target picture I thought I had shot seven but in reality, I had shot 8. The group measured .327! Tomorrow I'll give the 129gr Hornady SST's a go.

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  14. kev350

    kev350
    Gresham , Oregon
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    Very nice indeed.
     

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