6.5 Grendel Preferred Loads

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  • ErikS
    Warrior
    • Dec 2017
    • 138

    Anyone had any luck with 129 SSTs and ARComp? My Hornady manual does not list the powder. I see BL-C2 gives good speed with itin the manual.
    #shareyourspare

    Comment

    • Jmccracken
      Warrior
      • Dec 2017
      • 206

      Originally posted by Hermosa65 View Post
      Folks,

      Here are my latest results from my 6.5 AR. It has a 22" upper from Stryker Machine and Tool based in Winston Salem, NC. Using CFE223, I was averaging 1 - 1.5 MOA. With AR-Comp as per the picture below, I was able to get sub-MOA on 3 groups 0.69 - 0.95. Below is the .69 group. No signs of pressure.

      Alexander Arms Brass
      WSR Primers
      27.5gr AR-Comp
      123 Hornady ELD
      2.257 COAL

      [ATTACH=CONFIG]10906[/ATTACH]
      I work in winston salem. Small world

      Comment

      • Cajuntransplant
        Bloodstained
        • Apr 2016
        • 64

        I'm doing some workup with Sierra 107TMK bullets. Here's my ARComp results to share.
        Sunny and 45degrees out, Sierra 107TMK, ARComp powder, 2.255 COAL, new Hornady Brass, CCI 450 primers.
        Chronograph used is a magnetospeed V3, groups were shot with bipod and rear bag, chrono not attached.
        Rifle is a spare parts build with 18" Satern Barrel, Maxim bolt, Omega supressor, and adjustable gas block, nothing too fancy.

        **THESE ARE MY LOADS FOR MY RIFLE AND MAY NOT BE SAFE FOR YOUR RIFLE SYSTEM. USE AT OWN RISK.**

        All velocity strings were 5 shots.
        Groups were 5 shots and measured edge to edge and then subtracted bullet diameter.
        No flattened primers during any of the shots.
        Slight ejector swipe on three pieces of brass at the 28.4 grain charge.
        Going to try 8208 powder next and see what I can come up with.

        27.6 grains - Max 2547 - Min 2527 - Avg 2536 - SD 7.4 - Group size .53"
        27.8 grains - Max 2551 - Min 2542 - Avg 2546 - SD 4.0 - Group size .59"
        28.0 grains - Max 2567 - Min 2545 - Avg 2559 - SD 8.7 - Group size .78"
        28.2 grains - Max 2590 - Min 2579 - Avg 2584 - SD 5.0 - Group size .59"
        28.4 grains - Max 2607 - Min 2591 - Avg 2597 - SD 6.3 - Group size .37"

        Comment

        • beastep
          Bloodstained
          • Jan 2018
          • 82

          Thanks for the info.

          Comment

          • Cajuntransplant
            Bloodstained
            • Apr 2016
            • 64

            Here's the 8208 XBR results from today. Not what I expected.
            Cloudy and 30degrees out, DA -640, 85% Humidity
            Sierra 107TMK, 8208XBR powder, 2.26 COAL, new Hornady Brass, CCI 450 primers.
            Chronograph used is a magnetospeed V3, groups were shot with bipod and rear bag, chrono not attached.
            Rifle is a spare parts build with 18" Satern Barrel, Maxim bolt, Omega supressor, and adjustable gas block, nothing too fancy.

            **THESE ARE MY LOADS FOR MY RIFLE AND MAY NOT BE SAFE FOR YOUR RIFLE SYSTEM. USE AT OWN RISK.**

            All velocity strings were 5 shots.
            Groups were 5 shots and measured center to center.
            Had flattened primers and some ejector swipe at max charge.
            I think I'm going to stick with ARComp. Had better results overall with less powder.

            27.5 grains - Max 2450 - Min 2387 - Avg 2413 - SD 24.0 - Group size .91"
            28.0 grains - Max 2479 - Min 2445 - Avg 2455 - SD 13.4 - Group size .62"
            28.5 grains - Max 2531 - Min 2511 - Avg 2519 - SD 8.2 - Group size .54"
            29.0 grains - Max 2589 - Min 2567 - Avg 2580 - SD 9.9 - Group size .81"
            29.5 grains - Max 2644 - Min 2600 - Avg 2628 - SD 17.1 - Group size .76" (PRESSURE)

            Comment

            • beastep
              Bloodstained
              • Jan 2018
              • 82

              Those are still great groups and velocity. Thanks for the info.

              Comment

              • Cajuntransplant
                Bloodstained
                • Apr 2016
                • 64

                Originally posted by beastep View Post
                Those are still great groups and velocity. Thanks for the info.

                Comment

                • BluntForceTrauma
                  Administrator
                  • Feb 2011
                  • 3897

                  I think your 18" barrel is key here.

                  If Sierra's reloading data shows 2750 fps as the fastest speed for the 107 TMK in a 24" barrel (loading PPV and TAC), and if one loses about 25 fps per barrel inch, then we'd expect an 18" to get 2600 fps with that bullet. Right?

                  So, if your 29.0 XBR load averages 2580 fps from your 18", you're in the ballpark.
                  :: 6.5 GRENDEL Deer and Targets :: 6mmARC Targets and Varmints and Deer :: 22 ARC Varmints and Targets

                  :: I Drank the Water :: Revelation 21:6 ::

                  Comment

                  • Cajuntransplant
                    Bloodstained
                    • Apr 2016
                    • 64

                    Originally posted by BluntForceTrauma View Post
                    I think your 18" barrel is key here.

                    If Sierra's reloading data shows 2750 fps as the fastest speed for the 107 TMK in a 24" barrel (loading PPV and TAC), and if one loses about 25 fps per barrel inch, then we'd expect an 18" to get 2600 fps with that bullet. Right?

                    So, if your 29.0 XBR load averages 2580 fps from your 18", you're in the ballpark.

                    Comment

                    • wraith1516
                      Warrior
                      • Dec 2014
                      • 316

                      with a 20"bbl and a lapua 108 gr bullet over a charge of 30 gr 8208 xbr in a bhw bbl im getting 2730 fps with no pressure signs

                      Comment

                      • Cajuntransplant
                        Bloodstained
                        • Apr 2016
                        • 64

                        Originally posted by wraith1516 View Post
                        with a 20"bbl and a lapua 108 gr bullet over a charge of 30 gr 8208 xbr in a bhw bbl im getting 2730 fps with no pressure signs
                        Nice!! That's good info!!Thank you!

                        Comment

                        • SnipeDust
                          Unwashed
                          • Mar 2018
                          • 1

                          Originally posted by ErikS View Post
                          Anyone had any luck with 129 SSTs and ARComp? My Hornady manual does not list the powder. I see BL-C2 gives good speed with itin the manual.

                          Comment

                          • ErikS
                            Warrior
                            • Dec 2017
                            • 138

                            I used the data that Johnny used with the 129 Accubonds and had good luck. 1.5 MOA with his 26.7 load, I never used the highest he tried. It is minute of deer at 100yds so to speak. I use a 16in bbl and don't reach out. The BL-C2 loaded well and was about the same. I used data straight out of the book on that one.

                            #shareyourspare

                            Comment

                            • roor
                              Warrior
                              • Jan 2018
                              • 103

                              Comment

                              • Sticks
                                Chieftain
                                • Dec 2016
                                • 1922

                                Hornady 123 ELD.

                                Some of us are testing the Nosler 130gr RDF. Much better G7 BC.
                                Sticks

                                Catchy sig line here.

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