Soot on case necks

Discussion in 'Reloading' started by silverado, Nov 5, 2009.

  1. silverado

    silverado Member

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    Reloading a 243wssm with Varget powder. Seems to be excessive black soot on the case neck after firing. There is also a tiny amt that is at the side of the case. I think I read somewhere that this was low pressure and the neck was not sealing against the chamber allowing the soot to come out more than normal. Gun ok to fie? Any ideas for the excessive soot? Thanks.
     
    Last edited: Nov 6, 2009
  2. Forester

    Forester Well-Known Member

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    Whats the load? How many times has the brass been fired? Factory barrel?
     

  3. Topshot

    Topshot Well-Known Member

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    Could be low pressure, How does it go with factory ammo? Do you still get the same black residue. Need more info.

    Just keep an eye on pressure signs, is the bolt hard to lift? Look for splits in the cases and check primers for leakage. If you notice this then pressure could be high. Need more info.
     
  4. silverado

    silverado Member

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    40 grs Varget with WLR primers 70gr Nosler BT. Brass fired 3 times. Not a factory barrel. Hart barrel. Thanks for the help.
     
  5. silverado

    silverado Member

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    Only use factory ammo once. Cant be sure but I think there was less residue on the factory. Bolt is not hard to lift . primers not leaking. Thanks.
     
  6. Forester

    Forester Well-Known Member

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    The short mags harden necks up in a hurry, how much are you having to size them down?

    If you are sizing a lot, I would say try annealing a few and see if the problem goes away, if it does you will probably see more consistent velocities too.

    Biggest question, how does it shoot...soot aside?
     
  7. silverado

    silverado Member

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    Not sure of actual measurement of sizing them down but I had to turn the die past the shellholder 1/4 turn or so to get them to fit in the gun. Gun will generally shoot the size of a quarter. Some other research I did indicates as what you said concerning the neck hardening and try to anneal them to soften them. Thanks for the advice.
     
    Last edited: Nov 6, 2009
  8. britz

    britz Well-Known Member

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    I don't shoot that cartridge but after taking a quick look at hodgdon's site, I'd guess low pressure. You have to see how the primers look, how the bolt opens and so on to be a little more sure. Are you using published load data???
     
  9. boomtube

    boomtube Well-Known Member

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    "I think I read somewhere that this was low pressure and the neck was not sealing against the chamber allowing the soot to come out more than normal. Gun ok to fie?"

    Yes. And yes.
     
  10. silverado

    silverado Member

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    Hornady manual for charge but other manuals have it at higher loads.
     
  11. steve99

    steve99 Member

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    Are you using Nickel cases ?
     
  12. silverado

    silverado Member

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    No they are not nickel.