Announcement

Collapse
No announcement yet.

Barrel Crown

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    @ keese21. that parting of tool is blunt .... look at the push up at the sides of the cut.

    Comment


    • #17
      From the comments from people like Obermeyer and others on crowns, they say they want the sharp corner, but not burrs to the inside of the bore.
      If you keep the bearing centered and you break the corner, are you not creating a new corner.
      With wide enough muzzles I have cut recessed crowns with a flat crown. I started with Brownell crown cutting tool, but do not like it and do not use it.
      Tried free handing the bearing, marble or the tools Brownell has for that. I always check crowns with bore scope and they never looked right. So I quit doing that.
      With the Manson tool, the adjustable pilots align the cutter precisely with the bore. So no need for chamfering. The corners are always sharp and the way they should be.
      Would not mind having a lathe and learning to use it.
      "The United States Marine Corps is a drug and I am a recovering addict."

      "American by birthright… U.S. MARINE by the Grace of GOD!"

      "And on the 8th day God created Marines and like fish, we came from the sea!"

      Comment


      • #18
        Originally posted by Scuba1 View Post
        When we talk chamfer here, we are just breaking the sharp corner after cutting the crown. If done right, it is barely visible with the naked eye.
        Bear in mind when chamfering the muzzle that the lands will be cut deeper than the grooves, so they will confound and confuse (and be visible) unless you are aware of that. I have no clue how you would take the same amount of material off both.

        -Remote locations are cheap insurance.
        -There are two kinds of ships: Submarines and targets

        Comment


        • #19
          You are right ghrit. Once one just touches the grooves its time to stop. Some make that chamfer look more like a counter sink and thats just wrong and IMHO down right ugly.

          Comment


          • #20
            Thanks, that answers questions I had about using bearings.
            "The United States Marine Corps is a drug and I am a recovering addict."

            "American by birthright… U.S. MARINE by the Grace of GOD!"

            "And on the 8th day God created Marines and like fish, we came from the sea!"

            Comment


            • #21
              The amount of time that has passed indicate how much time I get to work on my projects. But here is where I am:

              Comment


              • #22
                Would you take a picture looking straight into the bore which would show all the lands, grooves and the corners.
                "The United States Marine Corps is a drug and I am a recovering addict."

                "American by birthright… U.S. MARINE by the Grace of GOD!"

                "And on the 8th day God created Marines and like fish, we came from the sea!"

                Comment


                • #23
                  It may just be the picture, but it looks like some chatter on the outside and uneven ring marks. Lock down the slides that you are not using to make the setup as solid as possible.

                  Comment


                  • #24
                    Last edited by keese_21; 01-02-2019, 22:47.

                    Comment


                    • #25
                      Now the photo is at full zoom on the iPhone. It looks much worse/ rougher than I believe it is. It is smooth to the touch and I have since buffed it and applied cold
                      blue to it.

                      Comment


                      • #26
                        It could be the angle of the camera or the light but it looks like it needs a little bit more crowning.
                        At 12 o'clock, the land looks like it should look.
                        As you go clockwise, the lands look shallower all the way to 9 o'clock.
                        Look at the groove 6-7 o'clock, how rough that area is. Should be as smooth as at 12 o'clock.
                        It is still rough, see the cotton strands on the crown, could be the rough crown or small burrs.
                        Shooting it will tell if the crown is good or not. If not good recut it a bit the same way it is in the picture.
                        "The United States Marine Corps is a drug and I am a recovering addict."

                        "American by birthright… U.S. MARINE by the Grace of GOD!"

                        "And on the 8th day God created Marines and like fish, we came from the sea!"

                        Comment


                        • #27
                          I'm no pro, but a lot of times I have seen machining on forums there`s no cutting oil, coolant used, this would give a smoother and finer cut on hard steel. I put a 45% chamfer at the end of my barrels but mine are .45 cal and for black powder.

                          While there`s bullets in the air, there`s hope!

                          Comment


                          • #28
                            This is what I consider the crown. That particular junction has to be as perfect as possible.
                            From what I have read from top gunsmiths, barrel makers and shooters the degree of the muzzle face is not that important.
                            It is the junction of the muzzle face and end of bore that is all important.
                            So 45* chamfer is good.
                            I particularly like the comment by Obermeyer, reknown barrel maker, on crowns.
                            Anyone can find Obermeyer's comments by doing a search for his comments.
                            Obermeyer prefers a recessed crown with a 60* chamfer.


                            This
                            "The United States Marine Corps is a drug and I am a recovering addict."

                            "American by birthright… U.S. MARINE by the Grace of GOD!"

                            "And on the 8th day God created Marines and like fish, we came from the sea!"

                            Comment

                            Working...
                            X