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What happened to this brass?

Discussion in 'Handloading and Reloading' started by tnieto2004, Apr 9, 2011.

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  1. tnieto2004

    tnieto2004 Member

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    2rr06mf.gif
    122n9c9.jpg

    That black part was not there prior to being fired.
     
  2. SDC

    SDC Member

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    My first impression is that this must have been a very light load, since you're not getting obturation (a good seal around the case), and it's leaving lots of unburnt power in the chambers; this also allows the gas from the powder that DOES burn to leak around the edges of the case mouth, darkening it the way you show. What's the load you were using for these (powder and weight)?
     
  3. Walkalong

    Walkalong Moderator Staff Member

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    Agreed.
     
  4. tnieto2004

    tnieto2004 Member

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    6.1gr of #5 pushing a 125 gr HP 38sp.
     
  5. dickttx

    dickttx Member

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    +1 on SDC.
     
  6. 243winxb

    243winxb Member

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    Work up a load with a magnum primer, might just get a cleaner burn. I always use a mag for 38 & 357. Bullseye or 2400, dont matter.
     
  7. ljnowell

    ljnowell Member

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    i have that as the starting load for a 125gr. 6.8gr as max. Needs more powder.
     
  8. Sunray

    Sunray Member

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    Please reduce the size of your pictures. This page will take until Tuesday to load for a dial up member.
    What black part? The wee ring around the rim? That'd be lube gunk or caked carbon. If the load was too light, the whole case would have carbon on it. Looks like the cases bounced on stones or whatever that cut through the nickel plating though. Not a big deal, but the rest of the plating will likely flake off.
     
  9. gamestalker

    gamestalker member

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    That actually looks pretty normal to me, and I load gobs of 38 and .357.
    Then again, are you trimming all of them to the same length? If not your crimp will be different from one to the next which might cause some varying burn efficiency. What inspired me to mention that was the unburned powder on the outside of the case. Also could be too light a charge as already mentioned.
    Just keep working the load and see if things change any.
     
  10. joneb

    joneb Member

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    I tried AA#5 for .45acp and it worked great. Then I thought I'd try #5 for .38spl with my starting loads I had the same result as you, as I worked up the loads AA#5 burned clean at the upper end of the load data.
    Good case neck tension and a heavy crimp helps, the unburnt powder will tie up the action.
    6.1gr of AA#5 is close to what I use with a 158gr bullet.
    http://www.accuratepowder.com/wp-content/uploads/2011/01/accurate_load_data_3.5.pdf
     
  11. BeerSleeper

    BeerSleeper Member

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    What are the tool marks about an eighth of an inch from the case mouth?
     
  12. RidgwayCO

    RidgwayCO Member

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    The tool marks are a case cannelure. They're to help prevent bullet setback.
     
  13. buck460XVR

    buck460XVR Member

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    .........same here.
     
  14. helotaxi

    helotaxi Member

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    Or to identify certain loads or bullet weights within a particular manufacturer's line of ammo.
     
  15. BeerSleeper

    BeerSleeper Member

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    I don't shoot a revolver yet, but I have 38 and 357 brass sorted from my range scrounging. The thing that puzzled me was some brass has it, others not.
     
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