300 win mag case trim to length

Discussion in 'Reloading' started by magedon44, Apr 4, 2014.

  1. magedon44

    magedon44 Well-Known Member

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    What length do most of you trim your cases to once fired?
     
  2. FearNoWind

    FearNoWind Well-Known Member

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  3. boomtube

    boomtube Well-Known Member

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    I haven't a clue what most do but I only trim sized cases, I don't care what length unsized cases are.
     
  4. MagnumManiac

    MagnumManiac Well-Known Member

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    I don't trim cases until they are beyond the max length, which is 2.620" for the 300WinMag, the trim to length is .010" less than max, or 2.610". If you measure new cases you will often find they are at the trim to length straight out of the packet.

    Cheers.
    gun)
     
  5. Lefty7mmstw

    Lefty7mmstw Well-Known Member

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    Just did up a bag of new winny 300win brass the other day; went to 2.605". Why, because it cleaned up and squared the case mouths. They'll grow with the first few firings so I'm not worried a bit about the slight under length.

    Btw, it seems win has gotten their act together again with their brass. The pockets required little uniforming, other than a bit on the short side the length was uniform, the brass was check weighed and all were within a grain of 238 grains after trimming and pockets.
     
  6. baldhunter

    baldhunter Well-Known Member

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    I trim mine at the max length instead of .010 shorter and find I actually trim less because the cases want to grow to max length.