20 practical case length

Discussion in 'Small Stuff--22s, 20s, and 17s' started by Mark McMahon, Nov 9, 2019.

  1. Mark McMahon

    Mark McMahon Gold $$ Contributor

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    Does anybody know what the overall case length should be for if 20 practical?
     
  2. pacificman

    pacificman

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    Should be the same as .223 ...Minimum ...1.750 ......You should check your chamber for max length to be exact. ;)
     
  3. RussellJ

    RussellJ Silver $$ Contributor

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    +1 to what Pacificman posted. Here a copy of a reamer print. It should help.

    upload_2019-11-10_6-6-42.png
     
  4. hogpatrol

    hogpatrol Don't criticize the farmer with your mouth full. Gold $$ Contributor

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    I use .223 length, 1.760, for maximum case length.
     
    nmkid, Mark McMahon and L.Sherm like this.
  5. Mark McMahon

    Mark McMahon Gold $$ Contributor

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    Thanks Guys
     
  6. AWS

    AWS

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    I have a Wilson trimmer that I leave set up just for 223 based cartridges, not having a pilot I can trim 20 Practical, 223 and 6x45mm with no adjustments.
     
  7. NorCalMikie

    NorCalMikie Gold $$ Contributor

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    One thing to do, no matter what round you're messing with, is to measure your chamber, write that figure down and refer to it often when reloading.
    You'll find that the "measured chamber length" will be about .020 longer than the max trim to length. Save your self some trimming.;)
     
  8. TAJ45

    TAJ45 Gold $$ Contributor

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    And also, just maybe, avoid some residue build up.
     

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