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  • LynnJr
    Calguns Addict
    • Jan 2013
    • 7955

    Shoulder Bumping?



    I was told that you can't bump a shoulder back on this forum.
    What is this called?
    Last edited by LynnJr; 08-15-2020, 7:23 PM.
    Lynn Dragoman, Jr.
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  • #2
    kevins750
    Senior Member
    • Feb 2013
    • 1376

    What cartridges are those?
    "To compel a man to furnish funds for the propagation of ideas he disbelieves and abhors is sinful and tyrannical." Thomas Jefferson
    NRA+CRPA member

    "Get yourself a Glock and lose that nickel plated sissy pistol" -------Deputy Samuel Gerard

    Comment

    • #3
      Capt.Dunsel
      Senior Member
      • May 2011
      • 1199

      Originally posted by LynnJr


      I was told that you can't bump a shoulder back on this forum.
      What is this called?
      He will be here any minute

      Looks like it is a "reformed" case , you didn't bump the shoulder , you "reformed" the shoulder to a new spot . ( that's what he will say )

      I have one like that , 30 06 case necked to 22 cal , we made a few of those for a rifle we built , ate the throats real fast . was a fast wildcat , accurate , but it burned out the throat in a few hundred rounds .
      Bweise says "I have to say the situation was not at all helped by 22 yr old former Airsoft douches who kept touting here, "But possession is not illegal!" "

      Fighting on the internet is like being in the special Olympics , everybody wins but your still retarded.

      Librarian " Calguns is not a 'general discussion board".

      Comment

      • #4
        JackEllis
        Veteran Member
        • Nov 2015
        • 2731

        Looks to me like the neck got stretched but the rest of the case was largely unchanged.

        Comment

        • #5
          kcstott
          I need a LIFE!!
          • Nov 2011
          • 11796

          Originally posted by LynnJr


          I was told that you can't bump a shoulder back on this forum.
          What is this called?
          Well that ain't bumping. That shoulder is far more than bumped, that was pushed and pushed hard for a good distance. But Fuzzy nutts will be along anytime to split hairs over reforming shoulders, setting shoulders back, and bumping shoulders.

          Comment

          • #6
            croue
            Senior Member
            • Jan 2013
            • 1255

            Looks like a mercury rocket set for takeoff!


            Sent from my iPhone using Tapatalk

            Comment

            • #7
              bigbossman
              I need a LIFE!!
              • Dec 2012
              • 11073

              But...... how many tensions?
              Always looking for vintage Winchester and Marlin lever action rifles. Looking to sell? Know of one for sale? Drop me a line!

              "Give a conservative a pile of bricks and you get a beautiful city. Give a leftist a city and you get a pile of bricks."

              Comment

              • #8
                SonofWWIIDI
                I need a LIFE!!
                • Nov 2011
                • 21583

                Originally posted by LynnJr


                I was told that you can't bump a shoulder back on this forum.
                What is this called?
                Uhhhh...photoshop?

                Sorry, not sorry.
                🎺

                Dear autocorrect, I'm really getting tired of your shirt!

                Comment

                • #9
                  Bumslie
                  CGN/CGSSA Contributor
                  CGN Contributor
                  • Oct 2011
                  • 5358

                  Neck size that sucker

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                  OP you are an uninformed tool.
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                  Comment

                  • #10
                    fguffey
                    Senior Member
                    • Mar 2010
                    • 1408

                    He will be here any minute
                    Thank you.

                    Bumping the shoulder back sounds cute, bumping the shoulder is as impossible as moving the shoulder back. Reloading is just too complicated for most. The reloader does not understand the shoulder they start with is not the same shoulder they finish with. They do not understand the new shoulder was formed from the case body and the old shoulder become somethin else. The picture proves the old shoulder became part of the neck.

                    The case on the left should have been trimmed big time'. Again, when forming 100 30/06 cases or 6mm Remington cases I have to trim between from 25" to over 30" from the case after forming.

                    The shoulder did not move back because it is impossible to do with a die that has case body support.

                    But if a reloader could manage to move the shoulder back he would crate a case with a bulge below the case body/shoulder juncture, and then if he was able to get real good at he could form cases with pleats, or folds lines an accordion.

                    And then it gets more complicated, 'bump' is a function of the press. I used an A2 RCBS press that had .032" cam over, AND THEN! It gets more complicated when identifying presses.

                    F. Guffey

                    Comment

                    • #11
                      freonr22
                      I need a LIFE!!
                      • Dec 2008
                      • 12945

                      Trimming 25"-30"!!
                      Thats crazy!
                      sigpic
                      Originally posted by dantodd
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                      Originally posted by bwiese
                      They don't believe it's possible, but then Alison didn't believe there'd be 350K - 400K OLLs in CA either.
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                      Our fate is ours alone to decide as long as we remain armed heavily enough to dictate it.

                      Comment

                      • #12
                        fguffey
                        Senior Member
                        • Mar 2010
                        • 1408

                        Neck size that sucker
                        I suggest the reloader learn to trim the length of the neck.

                        When my formed cases get into that shape I reach for the man tool, that would be the hack saw before removing (lower the ram) the case from the die.

                        After using the hack saw I use a file to finish. I have also used air craft counter sinks. But the answer that goes with the air craft counter sink could be too complicated for the reloader.

                        F. Guffey

                        Comment

                        • #13
                          fguffey
                          Senior Member
                          • Mar 2010
                          • 1408

                          Trimming 25"-30"!!
                          That's crazy!
                          __________________
                          You are correct but not impossible; unless the reloaders can figure a way to move the shoulder back and or bump the shoulder back. The shoulder I finish with is not the same shoulder I start with.

                          F. Guffey

                          Comment

                          • #14
                            fguffey
                            Senior Member
                            • Mar 2010
                            • 1408

                            Looks to me like the neck got stretched but the rest of the case was largely unchanged.
                            And then it gets more complicated; there is stretch and there is flow or is it stretch and flow? If the reloader could move the shoulder back and or bump it back the brass would not be able to stretch and or flow. If the shoulder could be moved back the brass would 'wad-up' below the shoulder of the die; now that is something that has to be complicated for a reloader to understand because the die has case body support, the support of the die prevents the case body from moving back.

                            Without case body support the case will bulge but reloaders do not understand that even when they try to crimp a case while seating a bullet. The seating die does not have case body support.

                            F. Guffey

                            Comment

                            • #15
                              fguffey
                              Senior Member
                              • Mar 2010
                              • 1408

                              I have one like that , 30 06 case necked to 22 cal , we made a few of those for a rifle we built , ate the throats real fast . was a fast wildcat , accurate , but it burned out the throat in a few hundred rounds
                              A smith build a few rifles he called 22 6MM Remington improved; he was desperate so I got involved. He had no ideal how long his chamber was from the shoulder/datum to the bolt face. What he did know while forming and fire forming he suffered 60 % case head separation.

                              Anyhow I formed cases for his rifle and sent instructions. He told me it could not be done.

                              F. Guffey

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