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  1. #1
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    Oct 2011
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    Colorado Springs
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    150

    Default Powder burns on reloaded casings

    On my first batch of hand loaded 9mm, I noticed all casings had powder burns around the mouth. Can anyone tell me if this results from the load being too hot, not enough crimp or is normal for hand loads. Thanks!

    Need more input:
    I increased the powder load and burns on the casing worsened. Here are my specifications:
    9mm, 115gr. Ranier copper-plated bullet
    Mixed headstamp range brass
    Bullseye powder--Speer guide shows minimum load at 4.2gr., maximum at 4.7gr--First batch I used 4.4; second batch was 4.5gr.
    OAL per Speer is 1.135 (range was 1.134 to 1.137
    Case mouth after crimp was .378 and base was .386 (these are the same as factory S&B and PMC)

    Powder burns are extensive (slightly more at the 4.5 load) but concentrated mostly to the left of a scratch in the base of the case running lengthwise (I assume from the extractor). Some of the burns turn the brass to a nickel color near the mouth. On some cases there are multiple scratches on both sides of the burn on the base of the case running lengthwise and on some there are also small lengthwise scratches 2/3 of the way to the mouth.

    I've shot the loads in a G17, G19 and Kahr K9 with the same results. At this point, I'm wondering if I need to increase the crimp or lighten the load. My search of Web forums yielded the same advice as members below. Any further thoughts would be appreciated.
    Last edited by cpapastr; 05-22-2013 at 06:41. Reason: Need more imput

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