New AR Biuld

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by nfhjr62, Mar 29, 2010.

  1. nfhjr62

    nfhjr62 Well-Known Member

    Messages:
    404
    Joined:
    Apr 17, 2008
    New build / a Stag lower with a DPMS upper .223-1/8-24 inch SS barrel now need to find some load's for it with 55 gr. MK, 68/69 MK and 77 gr. MK am i trying for too much and does anyone have some loads i can try.
     
  2. Chas1

    Chas1 Well-Known Member

    Messages:
    3,547
    Joined:
    Feb 15, 2009
    Congratulations on the build. Where's the pics?:)
     

  3. Kevin Thomas

    Kevin Thomas Well-Known Member

    Messages:
    1,256
    Joined:
    Feb 16, 2009
    About 24.0 to 24.5 grains of Varget or RL15 with a 77 is pretty much THE standard load for NM competive shooters, and should work well in your 24" bbl as well. For a bit better velocity you might want to try either N140 or N540. You should be able to bump those up by a grain or so for the 69s. For the 55s, I'd recommend a faster powder, something like Benchmark, H322, N133 or even N135.

    Easy combination to load for, since most everything seems to shoot in this one. Full length size, use a chamber gage to set up initially, and avoid crimping (neck tension alone is sufficient, if it's down around .002"), and they should do just fine for you.

    Kevin Thomas
    Lapua USA
     
  4. nfhjr62

    nfhjr62 Well-Known Member

    Messages:
    404
    Joined:
    Apr 17, 2008
    Thanks Kevin for the load info
     
  5. ForneyRider

    ForneyRider Well-Known Member

    Messages:
    99
    Joined:
    Jan 6, 2010
    Benchmark and AA2230 cover a lot of bullets for .223 and are easy to measure. I get about same velocity from AA2230, R15 and Varget with 69gr SMK.

    73gr Berger, 69, 77 SMK and 75gr Hornady BTHP can be loaded to mag length.

    Lots of triggers are on the market now. Les Baer went with the Geisele(sp?). I picked the JP Rifles for my DPMS.
     
  6. dk17hmr

    dk17hmr Well-Known Member

    Messages:
    158
    Joined:
    Nov 15, 2009
    I use 24.5gr of Ramshot TAC, with 55gr bullets loaded to 2.260" for my AR. My dad uses 25gr of H335 with 55gr bullets in all of his AR15's and bolt guns, I want to say he loads to 2.255". CCI 400 primers for both in any brass we can get. I shot some 75gr A-max with TAC powder and it did very well in my light weight AR.

    H322 works well also with 55gr bullets, 23.0grs worth.