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Crowning a muzzel

Discussion in 'Maintenance & Gunsmithing' started by RVTECH, Jun 23, 2010.

  1. RVTECH

    RVTECH LaPine Well-Known Member

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    Anyone have a whiz-bang method of crowning a muzzle? I have heard of one method of taking a large ball bearing, applying lapping compound and “rolling” it around the crown but any other ideas will be appreciated.
     
  2. raftman

    raftman Oregon Bronze Supporter Bronze Supporter

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  3. coop44

    coop44 Tacoma ,WA Well-Known Member

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    watched the video and said "duh, why didn't I think of that", very old school and very cool.
     
  4. MountainBear

    MountainBear Sweet Home, OR Well-Known Member

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    Yeah, cool, except I'd never do it on anything but a cheap .22 rifle. If you need to fix the muzzle on a centerfire rifle, take it to someone with a lathe and let them do it right...
     
  5. torpedoman

    torpedoman land of corrupt politicians Member

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    I have done a few centerfire as well as rimfire and it works real good on all of them
     
  6. MountainBear

    MountainBear Sweet Home, OR Well-Known Member

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    Sorry, the gunsmith in me feels like its a half-*** way to do it. I prefer the precision with a lathe. If it works for you, great. Me, I'll do it right, even if its just right for me. Besides, that limits you to a hunter's crown. An 11 degree target crown takes me about 30 seconds longer on a lathe, looks better, and works better for me...
     
  7. torpedoman

    torpedoman land of corrupt politicians Member

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    Whatever pops your socks.
     
  8. chemist

    chemist Beaverton OR Well-Known Member

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    I brought my Marlin Papoose barrel to Tornado Technologies for threading, and they put on a fresh crown at no extra charge!

    I agree that this DIY method looks kinda half-arsed, but like the vid showed, it was used on a virtual throwaway of a rifle.
     
  9. jlittlewolf

    jlittlewolf Eugene Member

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    You can also get crowning cutter kits which will do a great job... Although its all hand powered so it can take a little bit... But they work nicely!
     
  10. blacktailsniper

    blacktailsniper Dallas,OR New Member

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    Take it to a good gunsmith if you want it done right, especially if it is for any kind of precision shooting. If you have problems with it now, those other methods are just gonna make it worse.
     
  11. RVTECH

    RVTECH LaPine Well-Known Member

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    Thanks for the help. I am doing this on a Kel-Tec Sub 2000 so we are not talking MOA accuracy (although it does do quite well considering) It has no crown at all and I recently took it apart for a thorough cleaning and a little trigger work and I would have done the crown on my lathe but the design of the folding barrel does not allow for easy chuck up so all things considered any crown (even hand done) will be better than none.
     
  12. weezil_boi

    weezil_boi Sacramento-soon = Graham New Member

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    I did something similar with a beat up mosin. I sporterized it, cut barrel and re-crowned. I used drill press and a 3/8" Carriage Bolt. I just ran the head of the bolt against some 80 grit sandpaper for a minute to sand off the raised numbers on the head and smooth it down. It also made the head kind of "rough" then I pasted on some lapping compound and threw the barrel in the vise. Gentle and slow... crown came out very nice and it shoot much better (better than before anyway ;) ). I probably closed up my groups on it by about 2 inches, still not great, but my first attempt.
     
  13. madderg

    madderg Salem oregon Member

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    I'm one for a lathe also...a crown that isn't concentric and precise can really make things worse in a short time...more gasses on one side then the other..more erosion, etc..
     
  14. Redtazdog

    Redtazdog Washington in the sticks Active Member

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    And a much better chance of baffle strikes if you shoot with a can.
     
  15. The Cheese

    The Cheese somewhere special Member

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    if it ain't broke why fix it? If its shooting pretty good as is why mess with it? Yeah a recessed target crown could be nice and all, but really its not that expensive of a gun and you probably aren't going to gain much in the way of accuracy if anything at all. Accept it for what it is and its limitations. Those are great, handy little PCC's but I think you would be just throwing time money and effort at a problem that really isn't in need of a solution.
     
  16. Skeeterrancher

    Skeeterrancher Klamath Falls New Member

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    I have been a machinist for thirty years and have done some gun work along the way, I would not think of crowning a rifle any way but in a lathe. I would rather leave it alone.
     
  17. RVTECH

    RVTECH LaPine Well-Known Member

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    I agree - that is why I left the barrel I was going to crown alone (the Sub 2000 barrel) The folding design of the Sub 2000 barrel does not allow for easy disassembly and even if removed I do not see an easy way to chuck it up in my lathe.