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my method of reducing flash hole size

Discussion in 'Blackpowder' started by TheRodDoc, Nov 2, 2010.

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  1. TheRodDoc

    TheRodDoc Member

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    cut block for nipple to sit into. made mine from a chunk of 4130 chrome moly steel in the milling machine.

    place nipple into block with flash hole up. set a 3/16" to 1/4" bearing ball on flash hole and put in hyd, press. i went from .026" to .022". didn't seem to distort threads enough to make any difference.
     
    Last edited: Aug 27, 2011
  2. Oyeboten

    Oyeboten Member

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    Hi TheRodDoc,


    Why would one do this?
     
  3. BCRider

    BCRider Member

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    Smaller holes help reduce the blowback that shreds and spits the caps off the nipples and into the action where it can clog movement.
     
  4. Oyeboten

    Oyeboten Member

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    Oh...


    Okay.


    Cool!
     
  5. mykeal

    mykeal Member

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    Wouldn't buying a Treso nipple be easier?
     
  6. TheRodDoc

    TheRodDoc Member

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    my guns are mostly colts and i would rather keep original parts if possible
     
  7. Shoot The Moon

    Shoot The Moon Member

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    Slightly OT, but related.. Mykeal, what caps do you use with Treso? I find that RWS1075 are the best fit, but are tough to find...
     
  8. madcratebuilder

    madcratebuilder Member

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    Good idea, I well try that on a few sets of nipples. How much pressure did you use?
     
  9. StrawHat

    StrawHat Member

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    Sounds like a short term fix to me. The pressure is merely swaging a lip of metal into the flash hole and the gases will erode that out faster then if it were a solid column. A better fix might be to store the "COLT" cones in a sfae place and use Trescos or cones of your choice. Another solution that I have used is to turn the cones down to fit a smaller cap. At that point, I lay in a supply of caps to last me until the cones need to be replaced, usually 6 thousand or so.
     
  10. mykeal

    mykeal Member

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    I generally use Remington No. 11's, but understand that actual cap sizes can vary considerably. What works today may not work next month with a different batch of the same brand and size. You don't get 3 digit precision for 4 cents.
     
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