Standard v polygonal barrels?

Discussion in 'General Airgun Chat' started by ShaggerShaw, Feb 28, 2015.

  1. ShaggerShaw

    ShaggerShaw Ian

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    Standard (lands and groves) vs polygonal barrels for air guns

    Are polygonal barrels suited for air guns?

    I've seen the advantages with jacketed rounds but does a polygonal barrel work on a AIRGUN with a soft lead round?

    and if so is this limited to sub 12ftlbs or over 12ftlbs?

    What are the advantages/disadvantages?
     
  2. Ratinator

    Ratinator 77.74

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    Hi Ian
    I looked at the polygonal blanks today, then looked for your answer on the bbs.
    It would seem you have to ramp up the power to get the pellet to fill the barrel lands.
    Simon
     
  3. Ceathreamhnan

    Ceathreamhnan WHFTA Champion 2013

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    Drum of Leupy's Custom Shop showed me one of these when I visited. I can't remember much of the discussion but one advantage was that it wouldn't foul very easily.
     
  4. john79

    john79 JEDI

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    I had one fitted to a mk2 rapid in .22 cal and at sub 12 it was usless but at 800+fps it was very good ,I think it was something to do with the slower twist rate affecting the performance at slower speed

    atb john.
     
  5. Dave Ramshead

    Dave Ramshead England HFT Team squatter

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    They are also supposed to leave the pellet with a less damaged profile leading to better bc for the same speed,
    Like a halfway house between traditionally rifled barrel and smooth twist. This may be a load of old bs \ manufacturers spin as some technical development turns out to be.
     
  6. ShaggerShaw

    ShaggerShaw Ian

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    I know they work on jacketed bullets as glock pistols are leaders in the pistol market.

    What I read is they don't suit a full lead round (pellet) due to the excess fouling left in the barrel.

    Are hw100 fitted with a polygonal barrel? Is it just a case of lots of cleaning to ensure accuracy?
     
  7. herx77

    herx77 Member

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    Some?:eek:.
    HERX77 .
     
  8. holly

    holly Well-Known Member

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    I have had two of these barrels on GC2s . i found them to be silly pellet fussy . sold em and went back to the older MK2 standard GC2 barrels ??? HOLLY
     
  9. poison dwarf

    poison dwarf BANNED

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    Ive used these barrels but sub 12ft/lbs they are crap. Ramp up the pellet speed to nearer the 900 fps/15 ft/lb mark and they are brilliant.
     

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