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Zbroia Kozak Shroud

Discussion in 'Technical' started by Artie, Apr 24, 2019.

  1. phil.m

    phil.m Donator

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    OK, finally got around to measuring mine. Similar spec rifle & purchase time as yours, a shorty & mines 177.

    I measured the thickness of the spacer (the thickness of the bit with the largest diameter) without the o ring fitted to be about 4mm.

    With the spacer removed & the shroud refitted to the barrel, I measured the gap to be approx 3.6mm.
    So, not a mile out.

    Cylinder date is 09/18
    Ser no xk000952

    Purchased Feb time from Pellpax but suspect its 'recycled' like yours too.

    I can't comment on accuracy as I daren't use the rifle as I'm trying to return it & don't want to risk marking it.

    Are these the right bits to measure?
     
    PBaz Barrett likes this.
  2. Crash one

    Crash one Busy Member

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    I think you are measuring the O ring seal holder/stop ring thing that rests against the barrel/cylinder support? Mine measures 4mm also.
    It’s the depth of the female thread in the baffle/silencer in the front end of the shroud that is too deep in some cases.
    Yours is correct if the shroud doesn’t reach the barrel support by that 3.6 mm, that would give it about .4 mm of O ring “squash”.
     
    Artie, billy.whizz and phil.m like this.
  3. billy.whizz

    billy.whizz Busy Member

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    A BIG DAY TODAY, the prodigal rifle has returned home( many thanks too BIG DAN), maybe tomorrow or later I will get down too shooting it and find out if its sorted!!. the verdict from the gunsmith was, he cleaned the barrel!!, and reckons its made the groups much smaller . the regulator is not seated properly yet ,so the first shot is over the limit but after that its within the normal range. I will try it and we will see what its like.
     
    PBaz Barrett, Artie, phil.m and 2 others like this.
  4. TR158

    TR158 Engaging Member

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    I've been thinking about a long .22 to go with the shorty .177 Do you feel that the longer barrel brings anything more in terms of range / accuracy? Also, how does it handle conpared with the shorty?

    .
     
    PBaz Barrett and billy.whizz like this.
  5. Artie

    Artie Well-Known Member

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    Great news! I hope everything is sorted for you now. Big Dan is brilliant to deal with.
     
    PBaz Barrett, billy.whizz and TR158 like this.
  6. billy.whizz

    billy.whizz Busy Member

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    I did find time too shoot it today as well as fettle it,the spacer that we had printed by PBaz and Richie rich, I tried too fit that !! the problem I had was the shaped oring fitting at the action end of the shroud would not come off,this meant I couldn't fit the shroud over the spacer when its fitted too the barrel, in the end I made a new one from some 15mm copper pipe and cut that too the right length and refitted it all ,it now means the muffler /baffle screws right up tight on the barrel and doesn't move around ,the shroud fits tight on its o rings ,all is well with the world:). I then shot it around 20 odd shots , what a difference nearly pellet on pellet:D. apart from I presume the first hot shot it looks good. I need too take it too the club and chrono it next week and bench rest shoot it. will keep you updated. we have a lot too thank the guys who contributed too this thread and worked out what the problem was and then went on too produce a fix/part for it. great bunch of guys . DSC_0091.JPG
     
    PBaz Barrett, phil.m, ibo7 and 3 others like this.
  7. TonyB55

    TonyB55 Well-Known Member

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    They are both very accurate. The long .22 seems smoother to shoot and you do get a lot more shots per fill.
     
    TR158 likes this.
  8. TR158

    TR158 Engaging Member

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    Awesome news Billy, really happy for you.

    She's rocking those new brass accents well

    .
     
    billy.whizz and Artie like this.
  9. TR158

    TR158 Engaging Member

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    Thanks mate. Incidentally I spoke with Big Dan earlier today who tells me he's due to put up his latest review of the Kozak FC on YouTube. Apparently shoots really well, very accurate and he was getting a crazy shot count somewhere in the 200s out of a .177 if I heard correctly

    .
     
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  10. billy.whizz

    billy.whizz Busy Member

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    TR158, I know you've had a long journey too get too where you are now,it wont be much longer and you will be holding a new kozak:), im not sure I would fancy the new FC,its a bit square looking and lumpy, if that makes sense. B.ut for you my friend DAN is the boy too go too for your next one ,by far and away the best rfd going
     
  11. TR158

    TR158 Engaging Member

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    Cheers Billy. I agree on the FC, a bit marmite for me.

    Re Dan, absolute gentleman. Let's see what happens...

    .
     
    PBaz Barrett likes this.
  12. PBaz Barrett

    PBaz Barrett 'I love slinging lead me!'

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    when you say 'the shaped o-ring fitting at the action end of the shroud would not come off'.. it doesnt need to mate.. just unscrew shroud and fit the spacer on the unf thread of barrel (will only go on one way) Then just screw the shroud back on as normal. Just wondering.. Is the spacer at action end standard size?.. Nice one getting it sorted anyway, looks real nice blinged up!. Got my name down for the next batch coming along. :thumb:..
     
    TR158 likes this.
  13. PBaz Barrett

    PBaz Barrett 'I love slinging lead me!'

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    Nice one, I don't think you will go far wrong dealing with Dan.. looking forward to his new review coming up about the new Kozak FC..
    Have them tossers picked yours up yet?
     
    ibo7 and TR158 like this.
  14. billy.whizz

    billy.whizz Busy Member

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    PBaz, I will try and describe it again,,, at the action end of the shroud is a shaped holder and oring. the other end of the shroud is just an o ring.... unscrew the baffle assembly /pull out /pull of the shroud/ then fit the spacer too the barrel thread// push shroud tube onto the barrel/ you cant do this as the spacer diameter is larger than the shaped o ring holder at the action end of the shroud. // does this make sense??.
     
    TR158 and PBaz Barrett like this.
  15. PBaz Barrett

    PBaz Barrett 'I love slinging lead me!'

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    Hmmmm sort of.. I never bothered removing baffle from shroud (just unscrewed the whole shroud off) then fit the spacer and screwed back on.. Maybe your is a different setup?.. Anyways glad you got it done all the same. Credit to you, it looks lovely :thumb:. Mine is super accurate. 5p sized groups @ 50y other night.. :thumb:..

    Also I have just run a string through chrono and its doing 11ftlb.. Seems to have settled down now after a few 1000 pellet's. Still, happy with what it's putting out even if a tad low, got used to it now and know my holds at any range up to 100y! and can hit anything!. And feel safe well within legal limit :thumb:. All I need now is a set of them super brass bits.. to finish it off..
     
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  16. TR158

    TR158 Engaging Member

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    Sunday evening mate.

    .
     
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  17. TR158

    TR158 Engaging Member

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    I wouldn't worry about 11ft lb mate. It's actually only 0.5 less than the upper limit of people would usually set a sub 12 rifle to

    .
     
  18. PBaz Barrett

    PBaz Barrett 'I love slinging lead me!'

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    I could alter it easy enough but would need to start calibrating all over again (clicks on turrets - diff ranges). So quite happy with how it is. Super accurate and 14+ mags from a full fill down to 100 bar (prob could get down to 90 bar if needed). If I were you I would get a FC for sure!, and flog me yer brass bits as you will no longer need em :cool:..
     
  19. TR158

    TR158 Engaging Member

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    Um, wait, let me have a think about that

    .
     
    PBaz Barrett likes this.
  20. RichieRich

    RichieRich Donator

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    I'm going to do another shot string this weekend if i manage to get to the range. My tank has just had it's 5 year test and for the very first time, i've been able to fill the Kozzie to 300 Bar! So i'll shoot right down to the reg drop off and post my findings.
     

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