Crown

Discussion in 'Advanced Gunsmithing & Engineering' started by lancexxx, Aug 24, 2019.

  1. lancexxx

    lancexxx Buchanan Accuracy Gold $$ Contributor

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    Leave it sharp, or break the edge
     
  2. ridgeway

    ridgeway Silver $$ Contributor

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    Sharp and use a sharp cutter. picsay-1477013400020.jpg
     
  3. biggun2869

    biggun2869 Silver $$ Contributor

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    you guys are waaaaay above me I'm really just seeing if my membership has been upgraded.
     
  4. biggun2869

    biggun2869 Silver $$ Contributor

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    and it has! Knew it was about this time last year. Gary
     
  5. lancexxx

    lancexxx Buchanan Accuracy Gold $$ Contributor

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    I leave it sharp, just wondering what other folks do with it
     
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  6. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    Sharp on a target rifle. Youll have a drawer full of tools before you find the right one. When you do itll resemble this one
    BD8EF41A-BE07-4515-8696-FBC56578D7FB.jpeg
     
  7. msalm

    msalm

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    I use a sharp high rake hss bit and add a small 45 degree chamfer on all crowns. As long as it’s clean and concentric is the most critical IMO.
     
  8. Preacher

    Preacher Gold $$ Contributor

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    Sharp and slow works for me, nothing more...
     
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  9. boltfluter

    boltfluter Gold $$ Contributor

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    Micro 100 solid carbide mini boring bar for breaking the edge. Razor sharp and does a great job. Many of the top smiths use this bar with great results. Carry on. :D:D

    Paul
     
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  10. DaveTooley

    DaveTooley Silver $$ Contributor

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    It doesn't matter. I've done thousands with a chamfer. All indicated in +/- .00025"
    The universal test. Run a Q-tip in and out. Does it pick up any fibers?
     
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  11. GenePoole

    GenePoole

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    Yup, that's the tool.

    [​IMG]
     
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  12. PatMiles

    PatMiles Gold $$ Contributor

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    So what's the purpose of dumping these here?
     
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  13. Danny1788

    Danny1788

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    Positive rake inserts for AL leave a baby smooth crown for me. I’ve done flat & 11 degree, can’t tell any difference. I’ve broke the edge and left it sharp. I’m probably not a good enough shooter to know the difference. Just test it yourself and prove to yourself what is best.
     
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  14. bibsmachine

    bibsmachine Silver $$ Contributor

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    I am with Dave Tooley on this one I always use a small chamfer and it helps to keep from scraping the coating on your cleaning rods. Sharp crown works ok but It gets damaged faster I think.
     
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  15. DNorton

    DNorton Silver $$ Contributor

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    Only on special occasions, New Years and sorts. And only in moderation!
     
  16. gunsandgunsmithing

    gunsandgunsmithing The best tuners and wind flags on the market Gold $$ Contributor

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    I break the edge on hunting rifles etc but leave em sharp on comp guns. I do believe that either way can work fine. I keep a razor sharp hss tool just for crowning. Spin it fast, move it slow and finish with very light cuts. Just my 2 cents worth.
     
  17. Scott Harris

    Scott Harris Gold $$ Contributor

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    what is the benefit of a razor sharp crown? The benefit of breaking the edge is to prevent cleaning rod damage. I'm not aware of any accuracy advantage of a razor sharp crown.
     
  18. Dusty Stevens

    Dusty Stevens COVFEFE- Thread Derail Crew Gold $$ Contributor

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    Just gotta be even with no burs
     
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  19. Nightraider

    Nightraider

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    Sometimes not even then
     
  20. Shawnba67

    Shawnba67 Silver $$ Contributor

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    1 less operation to induce error's. I use my crossfeed as the finish comes out nicer. At a 45^ Its on my hand movement to keep feed rate consistant. I cant match the gears!
     

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