Barrel cleaning – pellet spiraling

Forums PCP Airguns Barrel cleaning – pellet spiraling

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    james.dean
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    Hi guys,

    A simple question, has anyone ever noticed this: pellet spiraling after a barrel cleaning ??

    My problem is that I have a 48 cm long .25 CZ barrel and I was using the 25.39 gr JSB with really good accuracy. I wanted to try the heavier king MK II for longer shooting and proceeded to a barrel cleaning before shooting them. The accuracy was there with these pellets but I noticed I needed adjustable mounts to zero where I want the rifle to be zeroed with them so I decided to go back to the standard kings, shooting at the same velocity BUT pellets are now spiraling. Dafuq ??!!

    Another issue is that I’m using strelok +. It is extremely accurate when I shoot with the 25.29 gr king, the pellet hits exactly where strelok tells me it should hit. Then, when I set everything up for the 33.95 gr JSB, accuracy is gone, I’m having a 3 dots of holdover difference between the app and the actual POI. I tried several different BC and I’m working with a chrony ( 272 mps for the 25.39 gr and 242 mps for the 33.95 gr).

    Any idea please ??? thanks =]

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    Eddy1840
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    I have a cricket.22 cz barrel I cleaned it with w-40 and I had the same problem after 500 rounds it is accurate like before..

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    ackuric
    Participant
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    don’t use w-40.

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    james.dean
    Participant
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    Nope !! Never use wd 40 mate, it will fook up your breach O-ring, personally, I only use .22 cleaning kit, dry. It’s perfectly adapted to the .25 barrel size..

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    spinj
    Participant
    Member

    If you are using a shroud/LDC, check for clipping.  That said, I am currently working on sharing another write-up that focuses on taking into account pellet design (and using different pellets to shoot) and shooting accuracy.  Pellet spiraling will also be addressed in the post.   

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    jking
    Participant
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    Hmm….all I use is WD-40 for my barrel cleaning. A couple of damp pull through’s and finish with normally 3 pulls dry. Very few pellets to get them re-seasoned. Never had any noticeable changes in my breech O-ring seal.
    JK

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    jking
    Participant
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    What gun is it James your having trouble with?
    jk

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    spinj
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    Deltadart106
    Participant
    Member

    New to air guns, what is spiraling?

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    jorgemac
    Participant
    Member

    “Deltadart106”New to air guns, what is spiraling?

    
Check the link above

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    james.dean
    Participant
    Member

    Thanks for the answers guys and thanks a lot spinj for the link ;)

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    james.dean
    Participant
    Member

    BTW Jking, it’s the Kral Puncher Breaker .25 =) 
    Just shot in the wind at 122 meters with the heavier JSB and accuracy is back to normal: excellent !! =)

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