6mm br or ppc in an AR 15 Platforn

Discussion in 'Main Message Board' started by Joel Dubose, Sep 15, 2018.

  1. Joel Dubose

    Joel Dubose Silver $$ Contributor

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    I was questioning in an AR-15 what type of bullets could be fired in that platform. Any thoughts on whether a 6 mm PPC or a 6 mm BR would work ?
     
  2. Dusty Stevens

    Dusty Stevens COVFEFE Gold $$ Contributor

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    Either one will work but neither is a good choice
     
  3. Dans40X

    Dans40X Welder

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    OP,
    Your concern/issue is bolt/breech faces-
     
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  4. Joel Dubose

    Joel Dubose Silver $$ Contributor

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    Please describe why?
     
  5. Dusty Stevens

    Dusty Stevens COVFEFE Gold $$ Contributor

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    Brass cost and feeding for the main thing. There are plenty of cartridges that will shoot as good for less money and less hassle
     
  6. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

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    Then a PPC? I think not.

    Joel I would give my vote to the PPC. More bolt assemblies are available for it. Basically just get one for a 6.5 Grendal. They both use the same parent case and rim size. You will be able to get feeding worked out better too. A BR is a bear to feed from anything with more then a 10rd capacity. With the PPC all you will need is a bolt head, mag and barrel. Try to get a mag for the 6.5 Grendal. It shares the most in common with the PPC.
     
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  7. joshb

    joshb Gold $$ Contributor

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    Based on recent postings, I’d do a 6mm Reddick!;)
    It’s based on the 223 cartridge, so “all ya gotta do” is get a new barrel! You should see the groups the inventor is posting! It’s a game changer!o_O:):):):eek:
     
  8. Knotwild

    Knotwild Silver $$ Contributor

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    How about some links to info on the 6mm Reddick?
     
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  9. riflewoman

    riflewoman Gold $$ Contributor

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    If you want a 6mm in an AR platform, I’d recommend any of the 6mm Grendel. With an 8 twist barrel these should do fine to 700 yards with a 95 grain bullet.

    The variants are the 6 AR and the 243 LBC both of which are basically identical as they are both necked 6.5 Grendel.
     
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  10. Tommie

    Tommie Gold $$ Contributor

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    Has a .473 boltface been done successfully on an AR15 platform?
     
  11. mensajd

    mensajd

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    Dtech 243 wssm. Brass is readily available and provides 6mm creedmoor/243 ballistics in an ar-15 platform. 95gr sierra hpbt bullets fit within mag length constraints and remain supersonic to 1k yds.
     
  12. Darryll

    Darryll Gold $$ Contributor

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    Not to stir the pot, but why do you want to choose these calibers? I don't have the experience that others do but why not try the 6MM x 45? I think that all you'd need would be a barrel and to have the headspace checked using a stock bolt. I don't think that magazines or feeding would be an issue and you'd have to neck up a .223 case to 6MM with the proper dies. If I'm wrong please correct me.
    Darryll
     
    Last edited: Sep 16, 2018
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  13. Falfan2017

    Falfan2017 Gold $$ Contributor

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    An Ar can't really take advantage of the accuracy potential of a ppc. You also don't really need the accuracy of a ppc unless you're competing in short range br. It's not going to feed as reliably as something like a 6 Grendel and you can still get plenty of accuracy from a well built 6 Grendel.
     
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  14. Exocet

    Exocet

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    6X45 is super accurate, mild, and plug and play in an AR platform.
     
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  15. holycow

    holycow

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    I shoot an NRA Ar Tact. match this month with an 6PPC AR using 90 grain Berger BT's score was 593 with 23 x's
     
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  16. joshb

    joshb Gold $$ Contributor

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  17. alinwa

    alinwa

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    that looks like good design.

    this is essentially what I do to nearly very case I shoot..... change the shoulder angle to 35 degrees, body taper to .010tpi and chamber so you can reset the shoulders for perfect crush fit.
     
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  18. orbitup

    orbitup Silver $$ Contributor

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    I have a 6x45 AR upper. I don't know why it isn't more popular. 95gn VMAX and a 9.5 twist barrel works great for ringing steel and clearing out jackrabbits.
     
  19. Spook

    Spook Captured too late to be fully domesticated.

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    this, and dont look back
     
  20. Spook

    Spook Captured too late to be fully domesticated.

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    yes over and over and over and..... PRI mags
     

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