Finally I get to Open a Bolt for PPC!

Discussion in 'Gun Project Questions & Gunsmithing' started by Grimstod, May 31, 2019.

  1. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

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    Ok so its not a PPC its a 6.5 Grendel but its the parent case. :D Ya I have wanted to do this for a while now. Its pretty easy. I am posting up photos below if anyone else wants to give it a go. The bolt is one I have fluted, bushed turned up and done a bolt lift kit on. Now its getting another barrel this time for 6.5 Grendel. Naturally its not the same bolt face as the 6.5x47 so a 223 bolt head was acquired with the ejector claw and plunger. Get the ejector claw for the 308 size not the 223. Pretty easy to open up the bolt head and true it up. I also bushed it to so it fits the old firing pin witch has also been bushed and turned down to a smaller size. The extractor claw was tricky and I use a big magnifying glass and DRO to know what is getting cut on that tinny part. It took some time back and forth on the mill but I got it right. Next one should be a breeze.

    IMG_3649.jpeg IMG_3650.jpeg IMG_3651.jpeg IMG_3652.jpeg IMG_3653.jpeg
     
  2. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

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    IMG_3655.jpeg IMG_3657.jpeg IMG_3654.jpeg IMG_3658.jpeg More photos of it after being trued up and a final of the assemble heads next to each other.
     
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  3. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

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    This is the mill work. You have to cut the underside and then flip it over and use a ball end mill to give the top a nice scooped ramp so the cartridge clips in easy. IMG_3660.jpeg IMG_3661.jpeg IMG_3659.jpeg
     
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  4. group therapy

    group therapy Gold $$ Contributor

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    what is the blue stuff called?
     
  5. carlsbad

    carlsbad Lions don't lose sleep over the opinions of sheep. Gold $$ Contributor

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    blue stuff.
     
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  6. carlsbad

    carlsbad Lions don't lose sleep over the opinions of sheep. Gold $$ Contributor

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    Ok. hope that was a bit funny. I call it bluing. Steel blue or layout fluid. Sometimes called by brand name, Dykem.
     
  7. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    It lets you know the exact moment your tool touches or you can scribe a line in it without gouging the part
     
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  8. milanuk

    milanuk Gold $$ Contributor

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    Didn't it used to also be called "Prussian Blue"?
     
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  9. group therapy

    group therapy Gold $$ Contributor

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    banging.gif
     
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  10. group therapy

    group therapy Gold $$ Contributor

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    yeah, maybe a littleo_O!!LOL
     
  11. Danny1788

    Danny1788

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    Thanks for sharing, this forum needs more stuff like this, I learn more and more every time
     
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  12. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

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    Thanks everyone. So the blue is a permanent marker. I have red black and blue on my bench for various things. I think the official technical term is marking fluid. I also keep a bottle of dark blue ink handy on the bench.
     
  13. Roeder

    Roeder Silver $$ Contributor

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    Prussian blue is "spotting ink". It stays wet and is used to mark contact areas when fitting parts. Layout dye dries very fast and is used to scribe layout lines or to show tool contact when machining or grinding.
     
  14. RWO

    RWO

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    For those that have a standard( .473") Savage bolt head, a new slightly longer extractor is all you need to work with the PPC head size in a single shot action. No bushing needed. I don't know about a repeater, but I suspect it will work there also.

    RWO
     
  15. milanuk

    milanuk Gold $$ Contributor

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    Good to know. Back in Uncle Sam's canoe club, I remember the machinist's talking about using Prussian Blue for some of their work... and some of their pranks. Not a lot of call for the stuff in electrical power / control work I did, and I steered clear of the latter!
     
  16. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

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    I found there is to much slop then. The ejector claw pushes it off center then you have primer strikes off center. Causes SD to go up. But that is a good quick and dirty way to do it.
     
  17. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    Your chamber is what centers the case, not the boltface. The boltface needs to be loose and have no influence on the case
     
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  18. redlabel12ga

    redlabel12ga Silver $$ Contributor

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    Savage made a pic bolt head
     
  19. redlabel12ga

    redlabel12ga Silver $$ Contributor

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  20. Grimstod

    Grimstod Machinist, Designer, and Shooter. Gold $$ Contributor

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    I know that. But your firing pin strikes will not be centered. That can ruin your SD and Harmonics. As the firing pin penentrates the primer off center, if it hits a leg of the anvil it will begin ignition earlier then if it hits between one of the legs of the anvil and will cause a lot of flyers.
     

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