Need a load for 1/8 bull barrel

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  • joem
    Senior Member, Deceased
    • Aug 2009
    • 11835

    #1

    Need a load for 1/8 bull barrel

    One of my AR's has a 1/8 twist 24" stainless bull barrel. I've been fooling with it for several years but I can't seem to find a load that's accurate. I've tried 55gr, 62gr and 69 gr bullets both Sierra and Nosler. Not that good. Does anybody have a load that might work?
  • Tuna
    Senior Member
    • Aug 2009
    • 2686

    #2
    You might try 21.5 gr. IMR 4198 with 55 gr. bullet and 21.0 gr. with a 62 gr. bullet. The IMR 4198 has always been an accurate powder with the .223 and 5.56. Just have to find the sweet combo for your rifle. Velocity will not be the highest but it will be accurate.

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    • Sunray
      Senior Member
      • Sep 2009
      • 3251

      #3
      Try a heavier bullet. Sierra makes 77, 80 and 90 grain Matchkings. Hornady makes 75 and 80 grain A-Max and 75 grain HPBT's. I'd be thinking IMR4064.
      Spelling and grammar count!

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      • joem
        Senior Member, Deceased
        • Aug 2009
        • 11835

        #4
        I'll try dropping the powder charge a bit and see if that helps. I have to order some more bullets znyway.

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        • snakehunter
          Senior Member
          • Sep 2009
          • 773

          #5
          Originally posted by joem
          One of my AR's has a 1/8 twist 24" stainless bull barrel. I've been fooling with it for several years but I can't seem to find a load that's accurate. I've tried 55gr, 62gr and 69 gr bullets both Sierra and Nosler. Not that good. Does anybody have a load that might work?
          Is it a 223 or a 5.56? If it's a 5.56 it probably has a longer throat. You might try seating the bullet farther out.

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          • joem
            Senior Member, Deceased
            • Aug 2009
            • 11835

            #6
            It's a 5.56 but the bullets can't be set any further out or they can't feed from the mag. I'm within .010 of the mag face. Droping the load seems my best bet or order some much heavier bullets.

            Comment

            • Dollar Bill
              Senior Member
              • Nov 2009
              • 156

              #7
              What powders have you tried. Varget, RL15, H4895, and TAC are the top rated powders by HP shooters.

              Comment

              • Jim in Salt Lake
                Senior Member
                • Aug 2009
                • 854

                #8
                I like 23.5gr of TAC with a Sierra 77gr Matchking. Same with the 80 gr Matchking but those won't fit in your magazines and need to be single loaded. TAC is a spherical powder and meters nice, temperature tolerant and burns pretty clean. A buddy of mine bought a couple 8 lb xxxx of Hornady LeverRevolution powder and swears by it. He found some for $125/xxxx a real good deal. It's a medium burning powder in the Varget/TAC/4895 range. I shoot a Rock River NM with a White Oak Armament 1/8" barrel. You might look for some Nosler 77s, too, I've seen good deals on them.

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                • joem
                  Senior Member, Deceased
                  • Aug 2009
                  • 11835

                  #9
                  I've tried TAC, Varget and 4895. Right now I have Accurate 2230 which works super well in my Colt match Target 1/7 twist. I think that's what I'll try for now.

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                  • joem
                    Senior Member, Deceased
                    • Aug 2009
                    • 11835

                    #10
                    DANG! Went to load some test bullets for Sunday at the range and I have no more 69 gr Nosler's. I don't remember using all of them. I must have CRS I guess.

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                    • Hip's Ax
                      Senior Member
                      • Aug 2009
                      • 258

                      #11
                      When you get more bullets try WW748, I think you will be pleased. I had the same problem trying to find a 100 yard load for my NM AR 1:8 twist years ago. Nothing I tried worked. One of the older shooters told me 52 gr Sierra MK and WW748 and then 69 gr SMK with WW748 for 200/300. Amazing accuracy out of my rifle.

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                      • joem
                        Senior Member, Deceased
                        • Aug 2009
                        • 11835

                        #12
                        Well I reduced the powder charge to min and increased it by 1/2 gr up to the max. I used a 69 gr Nosler. Everything was CRAP. I've loaded 10 each 75 gr hp's . If they don't work then > My next time out I'm taking several 30 round mags and I'm going to see just how hot I can get that barrel. My version of heat treating.
                        Last edited by joem; 10-06-2014, 01:15.

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                        • Hefights
                          Senior Member
                          • Dec 2009
                          • 596

                          #13
                          24 - 25 gr of AA 2520 and 69 gr Sierra MK you can't go wrong. 24 -25 gr of Varget & 69 gr Sierra works well too. Work up loads as per normal safety precautions.

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                          • joem
                            Senior Member, Deceased
                            • Aug 2009
                            • 11835

                            #14
                            I loaded some 75 gr HP's with 2230C. If it ever stops raining I'll try them out.

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                            • joem
                              Senior Member, Deceased
                              • Aug 2009
                              • 11835

                              #15
                              I tried out the 75 grs and that was the worst group I ever shot. Group size was 14 to 16" @ 100 yds. On my other rifles 69 gr for the 1/7 and 62 gr for the 1/9 twists. My thinking is something in between would be 65 gr. As soon as they are back in stock I'll try them. If that doesn't work then the barrel is history.

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