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Thread: Brass with carbon deposit

  1. #1
    Join Date
    30th June 2008
    Posts
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    Brass with carbon deposit

    My brass has carbon soiling or deposits on outside of brass. This usually runs about one half the case length on one side. My load for years is 200 FP Berry 45 ACP with 4.9gr Titegroup. Some say my load is too light. What say you? I run a GC SS Trophy.

  2. #2
    Join Date
    9th June 2004
    Location
    Alabama, US
    Posts
    1,745
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    25
    I say if your load hits the targets and cycles the action that you are just searching the internet for something to worry about.
    I load .45 ACP even lighter than that these days and a little smoke mark is routine. I have even seen such smoke marks on factory loads.
    Likes (1) :
    S.E.A. RAIDER (20th August 2017)


  3. #3
    Join Date
    2nd June 2004
    Location
    Terra
    Posts
    20,537
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    140
    That is a light load for that powder. The carbon deposits indicate that your load doesn't develop enough pressure to expand the brass and seal it to the chamber as the bullet leaves. If the blackening of the cases is a problem, try increasing the load by a tenth or two. Since you've been using that load for years, it would appear that perhaps it's not that big a problem.
    Hawkmoon
    On a good day, can hit the broad side of a barn ... from the inside
    Likes (2) :
    Mark75H (20th August 2017), S.E.A. RAIDER (20th August 2017)


  4. #4
    Join Date
    25th September 2006
    Location
    South of Lake Superior
    Posts
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    31
    One thing that might help the case make a better seal with the chamber with a light load is to leave the case mouth as large as possible - so it just barely plunks all the way into the chamber - perhaps about 0.473" OD.
    When you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind. [Lord Kelvin]
    Likes (1) :
    S.E.A. RAIDER (20th August 2017)


  5. #5
    Join Date
    2nd December 2004
    Posts
    438
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    0
    Accuracy is more important.

    Does it group well?

    Leave it alone and clean the brass.

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