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Reloading 300 BLK

Discussion in 'Ammunition & Reloading' started by civilian75, Dec 12, 2011.

  1. civilian75

    civilian75 Hillsboro, OR Well-Known Member

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    If everything goes well, by the end of this week I will have a .300 BCK upper I will pick up from TNT Weaponry at the Expo Center and most reloading tools and components.

    1. Seems that AA1680 is the favorite propellant for sub-sonic loads, but I do not have any. Who carries it locally? Any vendor who frequents the PDX gun shows?

    2. If I can't get any AA1680, what about AA5744 as a plan B? I have a 2-3 lb of AA5744 (extruded), a bit faster and bulkier than AA1680 (ball). Has anyone tried it with 220gr SMK? Me thinks it should work fine on a pistol length gas system.

    3. I’d like to experiment with .309 cal 200-240gr cast bullets. Problem is, I don’t do cast and have no intentions to take up yet another hobby. Does anyone know who has them? I know of a couple of vendors who have gas checked bullets which are almost as expensive as match jacketed bullets. That’s not what I want. I am looking for the typical bullet used for .30-06 at under 1800fps that can feed reliably on the AR platform.
     
  2. Nwcid

    Nwcid Yakima and N of Spokane Well-Known Member

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  3. Greenbug

    Greenbug Bend Well-Known Member

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    AA1680 is the way to go for sure, Wholesale Sports (the old Sportsman's Warehouse) stocks it for abour $20 a pound. 11.5 grs with a 220 gr SMK does the job at about 1050 FPS from my 16" BBL.
     
  4. civilian75

    civilian75 Hillsboro, OR Well-Known Member

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    That depends on a number of things. I already do it on a different rig. No issues so far.

    So, if you know of any .309 cal 200-240gr cast bullets for sale.
     
  5. nrc

    nrc Oregon Member

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    1680 is a good powder. The quarterbore site has a lot of good info, as posted above.

    H110 is the only powder I use for the 300blk aka 300/221 aka 300 fireball aka 300 whisper. For supersonic or subsonic loads it is hard to beat.