Barrel length

Discussion in 'Piston & Spring' started by Andy B, Oct 11, 2018.

  1. FPoole

    FPoole Active Member

    Joined:
    Dec 10, 2011
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    156
    Location:
    Plant City, FL USA
    Pretty sure the HC and full length are identical, except for barrel and cocking arm length.
     
  2. Nomads HFT

    Nomads HFT Well-Known Member

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    Sep 27, 2015
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    Worcester
    Plus the HC has a thrust (preload) washer to counter the slightly lower energy efficiency of the shorter barrel.
     
  3. RobF

    RobF Administrator Staff Member

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    Mar 4, 2010
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    12,842
    Location:
    New Forest, Hampshire
    Club:
    Parkstone Gun Club, South Dorset FTC, Southampton Buccaneers
    Ah gotcha
     
  4. Artfull-Bodger

    Artfull-Bodger Member

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    Feb 7, 2010
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    316
    Location:
    Llantrisant
    after testing different barrel lengths I settled on 14" as the best compromise, the shorter the barrel the quicker you have to accelerate the pellet up to velocity so the more spring/piston speed/mass you require, end result is an improved firing cycle along with less muzzle flip on the longer barrel.
     
    Adam and hmangphilly like this.
  5. Cooper_dan

    Cooper_dan Well-Known Member

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    Jun 14, 2017
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    Location:
    Swadlincote
    I've got a barrel in the post which I'll be putting on my prosport. Taking a punt at 16" and will see what happens...
     
  6. Akita

    Akita Member

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    Sep 26, 2013
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    Location:
    UK
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    Greyhound & Purley Chase
    Here the MK3 HC can come with a bigger piston weight to keep the power.
     
  7. Nomads HFT

    Nomads HFT Well-Known Member

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    Sep 27, 2015
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    Location:
    Worcester
    The .177" and .22" each have different piston weights, and the HC supplements them with a preload washer.
     

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