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  • 6XC Loads

    Just ordered a 6XC barrel for my AI.

    Looking for loads using H4350, Varget and RL17.

    Thanks.
    2015 AI AX308
    24" Bartlein 6.5 Creed w/ lil bastard
    S&B PMII 5-25x56 H59
    Spuhr 4002
    Atlas

  • #2
    This was my initial tests, 28in bartlein with a 1:7.7 on a savage action

    Comment


    • #3
      Norma Brass
      Berger 105 Hybrid jumped .015"
      39.5-39.9gr. H-4350
      Fed 210M
      3045-3105fps in 26.5" barrels

      Comment


      • #4
        Norma Brass
        Berger 105 Hybrid (Moly) jumped .012"
        38.9gr VV N550
        210M
        3120 fps 27" barrel

        ^^ Low pressure load
        RL 17 will produce the most speed for you with less pressure, no guarantee accuracy wise.

        Comment


        • #5
          I use the 115 dtacs over 40.5 grains on H4350 and get 2,950 FPS in my AI AX barrel. No pressure signs or anything.

          It is a bit slower than I would like but getting up to 3,000 FPS really is not going to change anything.

          The DTACs are amazingly consistent as well.

          Guys are getting more speed out of the RL powders though.

          Comment


          • #6
            Started load development today:

            H4350 38.1gr-39.9gr in 0.2gr increments.
            CCI BR2
            Berger 105 Hybrids
            Length to Ogive- 2.19"
            COAL- 2.79"

            I'll have results on sometime on Thursday.
            2015 AI AX308
            24" Bartlein 6.5 Creed w/ lil bastard
            S&B PMII 5-25x56 H59
            Spuhr 4002
            Atlas

            Comment


            • #7
              Load development worked pretty well. 6xc is stupid accuracte. Probably going to go with 39.7 to start. It's a slightly larger vertical group than the 38.9, but it's faster and my barrel was really starting to heat up by the time I got to 39.7. I'm only getting 2920fps out of it but I think it'll speed up a bit when I get some more rounds on the barrel.
              2015 AI AX308
              24" Bartlein 6.5 Creed w/ lil bastard
              S&B PMII 5-25x56 H59
              Spuhr 4002
              Atlas

              Comment


              • #8
                IMO it's a waste of time to do load development before putting some rounds down the barrel. Finding a load that the barrel likes at round #50, then hoping/assuming it will speed up AND still be in tune seems a bit backwards. Shoot 100 mild practice loads, if the barrel speeds up it "should" be done, then start your load workup.

                Also, there's no need to do 0.2gr increments for a ~40gr load. 0.3 or 0.4gr will be fine to accomplish the OCW, you'll waste less time and components, and you'll be able to fine tune in the next step.

                Any pressure signs? I like to load beyond what I think max pressure will be, since you never know with that barrel/powder/bullet what the max will be. It's easier to stop when you see pressure and pull the rest of the bullets when you get home than it is to wonder if you could've pushed it further and you have lower than expected velocity...then make another range trip for mini-OCW #2. Ask me how I know LOL

                Comment


                • #9
                  Don't have time for that. I only have a week to get things ready for the grind. No pressure signs. Groups are all roughly where I want them to be. If it speeds up over the next 50, great. If not, I'm perfectly content with 2920-2950. i'll be doing a true load work up this winter.
                  2015 AI AX308
                  24" Bartlein 6.5 Creed w/ lil bastard
                  S&B PMII 5-25x56 H59
                  Spuhr 4002
                  Atlas

                  Comment


                  • #10
                    And 0.2gr increment gives 38.1-39.9gr which tops out where most everyone using 4350 including myself seeing a node.
                    2015 AI AX308
                    24" Bartlein 6.5 Creed w/ lil bastard
                    S&B PMII 5-25x56 H59
                    Spuhr 4002
                    Atlas

                    Comment


                    • #11
                      Who cares what everyone else is using? If you're not seeing pressure signs, who's to say you couldn't go another 0.5gr or more higher to get 3000fps?

                      I've had slow lots of powder that didn't match up with data online...

                      The 0.3gr is just a suggestion to save time, components, and hopefully confusion with the OCW. Instead of 10 5-shot strings to cover only 1.8 total grains, why not 8 5-shot strings that cover 38.4-40.5? If you graph the velocity you should see a flat spot that correlates to your accuracy node. If you run into pressure then stop and pull the bullets. If you were shooting a 338 Lapua with 90gr of powder, would you still use 0.2gr increments?

                      Comment


                      • #12
                        39.7gr H4350
                        Norma Brass
                        BR-2 Primer
                        105 Hybrids
                        Jump .01

                        Getting 3075 from a 26" barrel

                        Comment


                        • #13
                          Originally posted by samb300 View Post
                          Who cares what everyone else is using? If you're not seeing pressure signs, who's to say you couldn't go another 0.5gr or more higher to get 3000fps?

                          I've had slow lots of powder that didn't match up with data online...

                          The 0.3gr is just a suggestion to save time, components, and hopefully confusion with the OCW. Instead of 10 5-shot strings to cover only 1.8 total grains, why not 8 5-shot strings that cover 38.4-40.5? If you graph the velocity you should see a flat spot that correlates to your accuracy node. If you run into pressure then stop and pull the bullets. If you were shooting a 338 Lapua with 90gr of powder, would you still use 0.2gr increments?

                          Its ts too late to do it any other way before the grind. Doing 0.3gr increments will have to wait until after the season then I can try other powders as well. Switching calibers this late wasn't in the plan.

                          i would do 0.2gr on the .338L because I prefer not to rearrange my facial features.
                          2015 AI AX308
                          24" Bartlein 6.5 Creed w/ lil bastard
                          S&B PMII 5-25x56 H59
                          Spuhr 4002
                          Atlas

                          Comment


                          • #14
                            36.8-37.0 of varget is money in the 6xc for my AXMC
                            Solve problems by deleting them.

                            11B/B4

                            https://m.facebook.com/profile.php?id=247780215346272

                            Comment


                            • #15
                              The lot of H4350 I was running last year gave me pressure signs with 39.8 grains, settled on a 39.4 load to run. The lot of H4350 I was running this year, I didn't have pressure until 41.0 grains and settled on a 40.0 load to run...

                              Stopping before pressure signs because the internet says so, is only putting you at your own disadvantage. That 40.0 load was getting me 3060 fps after 200 rounds were on the barrel, I saw velocity increases all the way to 200 rounds on both barrels this year.

                              If you're running H4350 with 105-108 grain bullets, start at 38.5 and work your way up.

                              Comment


                              • #16
                                Originally posted by K_4c View Post
                                36.8-37.0 of varget is money in the 6xc for my AXMC
                                What kind of velocity are you seeing with Varget? Would be nice to get that to work, it's more available and I have a shit ton of it.

                                Comment


                                • #17
                                  37 grains varget
                                  Solve problems by deleting them.

                                  11B/B4

                                  https://m.facebook.com/profile.php?id=247780215346272

                                  Comment


                                  • #18
                                    Just placed an order at Kreiger for a 28" barrel chambered in 6xc kind of excited to see how it compares to my 26" barrel. Unfortunately I have to wait 4 months.
                                    2015 AI AX308
                                    24" Bartlein 6.5 Creed w/ lil bastard
                                    S&B PMII 5-25x56 H59
                                    Spuhr 4002
                                    Atlas

                                    Comment

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