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177 kral bullpup

Discussion in 'Anything Airgun Related' started by j rayner, Jun 16, 2016.

  1. biotaw1

    biotaw1 Engaging Member

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    Does sound like you got a good one then:up: What sort of groups does it produce out of interest?

    I've just had mine replaced by the RFD so it'll be interesting to see if it's better than the other one.
     
  2. j rayner

    j rayner Engaging Member

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    what distance was you shooying jim,,,,,,any pics of your target,,,?
     
  3. Jim-in-Darwen

    Jim-in-Darwen Donator

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    The target I put out was at 34 Metres (just happens to be the distance to the back plate at the wind out device)
    First thing I did was to adjust the scope but that done the pellets were all in the 1cm dots I had printed on the card giving just a single hole.
    Also had printed some 5mm dia holes on the card and shot at those getting most inside.
    Thankfully zero wind this morning so that helped.
    Never bothered taking photographs as this was just a test to see if I had a good one and I don't normally shoot card but spinners and knock downs out to 60+ yards

    Jim
     
  4. j rayner

    j rayner Engaging Member

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    thanks for the reply jim,,,,you deffo got a good one,,,nice
     
  5. Jim-in-Darwen

    Jim-in-Darwen Donator

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    Of course with the 5mm circles it was a case of no other circle appeared outside as the pellet is slightly bigger than the dot. ;)
    Certainly plenty accurate enough for what I want it for.

    Jim
     
  6. j rayner

    j rayner Engaging Member

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    sounds like a tack driver to me jim,,,,,glad your sorted
     
  7. Citizen K

    Citizen K Well-Known Member

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    It seems quite a few have shipped with rail mounted the wrong way around..
     
  8. biotaw1

    biotaw1 Engaging Member

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    I could be on to something here...

    I've been testing my Kral rested on a sandbag on the basis that that should reduce the shooter error and let the rifle perform at it's best, however I've noticed that I seem to get better groups with the rifle in my shoulder. Seems to be exhibiting springer-like hold sensitivity, now why would that be?

    Jim, are you getting your good groups off a bag?
     
  9. Jim-in-Darwen

    Jim-in-Darwen Donator

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    Yes as I can not hold a gun steady freehand. Age and arthritis have taken their toll.
    It is only resting on the front bag as a support without being held down to it. Both hands at rear with one on trigger and the other under that and resting on bench to adjust the height. Hope that makes sense.

    Jim
     
  10. cybernet69

    cybernet69 Banned

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    Think I know what could be happening here. Isn't it the case that the barrel is not free floating. Therefore, if you are resting it on a bag or such then maybe that is pushing the cylinder up and in turn pushing the barrel up. Now, it only has to be very slight to cause a flyer etc ?

    Is the ring at the end which supports the cylinder and barrel made of plastic as it could be causing some flex.
     
    Last edited: Jul 20, 2016
  11. Jim-in-Darwen

    Jim-in-Darwen Donator

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    Just a word of advice:-
    Having read about some problems with the filler probe O rings getting damaged in the filler port I ordered some from Ebay. These were advertised as being for the Puncher/Breaker but when they arrived they were clearly different and when placed on the probe would not allow the probe to be fully inserted.
    Now as the Breaker is the Puncher in a bull pup stock you can forgive the supplier for thinking they were the same but they are not. There is some small difference between the filler unit in the Breaker and Puncher. After an on line conversation with them I posted them a pair of the correct ones and they now do have a supply of the correct size O rings for the Kral Breaker. They have gone out of their way to sort this difference out and secure a supply of the correct ones.
    Anyone wanting to get some spares in should try Richard at Bagnall & Kirkwood http://bagnallandkirkwood.co.uk/

    Jim
     
  12. biotaw1

    biotaw1 Engaging Member

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    Yep, exactly how I do it really so clearly there's something different about either my rifle or my technique.

    I had a similar problem when using a bipod on my CZ200, which was cured by removing the barrel band. I have actually tried that with the Kral too without success, however I left the scope rail in place so maybe that is having an impact although it doesn't seem to be touching the barrel. The barrel band is metal by the way.
     
  13. Jim-in-Darwen

    Jim-in-Darwen Donator

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    Could it just be something as simple as I have been using a pellet that my barrel is happy with.
    I am using JSB Jumbo 5.51mm.
    I tried H&W Super Field but it was not as good with them. Not bad but just not as good.

    Jim

    Edit - just as good with JSB Jumbo Heavy but poi changes by 1/2 mildot at 45 yards
     
    Last edited: Jul 21, 2016
  14. biotaw1

    biotaw1 Engaging Member

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    Well it's possible I've yet to find the right pellet but I've tried numerous different brands, weights and now also head sizes. If it's that pellet fussy then to my mind it's still not right, even if there is one elusive pellet out there that will perform in it. In my other guns, the difference between the best pellets and the worst when comparing "good" brands is nothing like enough to produce the inaccuracy I get from the Kral.

    I need to do more testing around the method of supporting the gun as it looked to make a difference the other day.
     
  15. Jim-in-Darwen

    Jim-in-Darwen Donator

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    I am not saying it is pellet fussy but just throwing another possibility into the mix. It will be interesting to see how your experimentation with hold comes off. Someone else at the club I belong to shot mine and said he would find it difficult to be accurate with that trigger which he described as heavy with a lot of first stage travel. I have since adjusted the trigger. I found that the screw controlling the second stage let off point was screwed almost fully in. The instructions for the Puncher say that you can reduce second stage by screwing that screw in but if you do it becomes heavier. I think as it is operated from the push rod which pulls the rear trigger forward to fire the whole thing is arse about and I found it improved the let off point by turning it anticlockwise. The first stage can be reduced by tightening the aerotight nut on the push rod. I did find however that adjusting one had an effect on the other so it is just a case of playing around with positions of that screw and the nut to get what feels best.

    Could it be that the inaccuracy is caused by the uncertainty as to just when the let of is going to occur?

    Jim
     
  16. j rayner

    j rayner Engaging Member

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    best bet is to get it rock solid in a gun rest,,,,table mounted,,,then try
     
  17. biotaw1

    biotaw1 Engaging Member

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    I think with this gun that isn't the way (at least with mine). I've done a load of shooting today and starting to get good groups finally. Basically if I rest it on my sand bag which is very firm, it's all over the place. If I put a folded towel under the stock so it's softly supported the groups tighten right up, which is why it shoots better out of hand than off a rest. It's basically got the hold sensitivity of a poorly tuned springer.

    Now with the trigger lightened right off and using a soft rest it's getting respectable groups. Not as good as my Weihrauch springers or my CZ200 but not far off and pretty respectable. Somewhere in the region of 6mm c-t-c at 20 yards with the caveat that it still takes a lot of concentration and it's very easy to pull shots miles off target.

    Also tested the power...11.1 ft.lbs with JSB exacts and 11.94 ft.lbs with JSB Heavies on the high setting and about 7.5 ft.lbs at the lowest setting (all at 150ish BAR, haven't done a full shot string). A bit close with the heavies!
     
  18. cybernet69

    cybernet69 Banned

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    You might want to check it with Bisley Magnums or the 'Big Boy' pellets. You might find its .... dare i say it ...... But I wont.....
     
  19. biotaw1

    biotaw1 Engaging Member

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    Well I'm thinking of saying to hell with the warranty and removing all the AT so I can fix its various issues, in which case I can adjust the power easily if need be. It's crying out for a lighter hammer spring for one thing, and I reckon it has the potential to be smoother, more consistent and use less air with a bit of work. Also means I can get the barrel off and get it "accurised" too.
     
  20. cybernet69

    cybernet69 Banned

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    Well, if you do remove it then makesure it is below you know what before you take it out. Otherwise if it wasn't .... and the .... has been removed....and you get stopped by you know who then it wouldn't end well. :( You know what I mean. :)
     

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