What would you guys say about this shot string?

Forums PCP Airguns What would you guys say about this shot string?

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    zx10wall
    Participant
    Member

    It’s under warranty. Send it back. It shouldn’t perform that way ever.

    The Uragán is a fabulous PCP but I’ve seen several of their regs that were not functioning properly. It’s not the same reg as in the Vulcan. It’s a much smaller unit in diameter and a bit longer. 

    With that said, most work great and perform very well. 

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    nervoustrig
    Participant
    Member

    First thing to do is try setting the hammer spring tension to deliver 95 – 97% of peak velocity.  That will make it as insensitive as possible to slight pressure variations.

    Then if you haven’t already, give it up to 500 shots to break in the regulator.  The cycling open and close will help to break in the valve seat.  If that does not being down the ES to your satisfaction, you can polish the seat, replace the seat, or send it back.

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    Mrshosted
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    nervoustrig

    The fast first shots suggest two things:

    1.       the regulator is creeping

    2.       the hammer strike is adjusted too firmly

    I agree, I'd back the hammer spring off a half turn to a turn trying to get around 870-880FPS

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    Rj
    Participant
    Member

    I don't know if I'd even waste air and pellets on that one Dillon. Its declining from the start with no signs of leveling out. Shouldn't have to try and tune around that big of a mess. Id send it back. 

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    nervoustrig
    Participant
    Member

    The hammer spring tension is clearly not adjusted properly.  In spite of that, the second string has a nice flat run in the middle.  At least try that, after all it’s not as though returning it requires zero effort either.  

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    Dairyboy
    Participant
    Member

    One last shot string. This time after it's been sitting for 5hrs. 2 mags with the 18gr JSB.

    Saved Chrono Group – 12-16-2019 05:31:01 PM
    Created: 12-16-2019 05:31:01 PM
    Description: 
    Notes 1: 
    Notes 2: 
    Distance to Chrono (FT): 2.00
    Ballistic Coefficient: 1.000
    Bullet Weight (gr): 18.130
    Altitude (FT): 0.0
    Temp: 49 °F
    BP: 1025.00 inHG
    Shots
    #     FPS        FT-LBS     PF
    24    860        29.78      15.59     
    23    867        30.27      15.72     
    22    865        30.13      15.68     
    21    ERROR 2
    20    868        30.34      15.74     
    19    868        30.34      15.74     
    18    873        30.69      15.83     
    17    872        30.62      15.81     
    16    873        30.69      15.83     
    15    874        30.76      15.85     
    14    880        31.18      15.95     
    13    872        30.62      15.81     
    12    877        30.97      15.90     
    11    879        31.11      15.94     
    10    879        31.11      15.94     
    9     875        30.83      15.86     
    8     880        31.18      15.95     
    7     886        31.61      16.06     
    6     889        31.82      16.12     
    5     890        31.89      16.14     
    4     893        32.11      16.19     
    3     ERROR 2
    2     903        32.83      16.37     
    1     890        31.89      16.14     
    Average: 877.86
    StdDev: 10.45
    Min: 860
    Max: 903
    Spread: 43
    True MV: 878.06
    Shots/sec: 0.15
    Group Size (IN): 0.00

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    pat585
    Participant
    Member

    I had the same problem with my Uragan .22. I took off the butt stock because their was some creep in my trigger i needed to adjust out, and noticed the small allen screw for the hammer spring was loose. Probably from being 14 days in transit? Anyway i got it on the chrono at 880fps and locked down that screw & my last 20 shots had an es of 8. I've only got about 300 pellets through mine.

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    Dairyboy
    Participant
    Member

    Ok just wanted to clear some things up here. My point of this post is NOT about the gun in question at all. What I'm asking simply is that do these string look ok or normal to you for a regulated gun and that it's fine as is. These guns are very nice guns and I actually really like this one alot. The best bullpup I've owned overall minus the reg issue but it's not the point of this post. I've got a RMA for the gun now and will be returning it. But from what I was told over the phone the shot strings looked "normal". All I'm asking is if I'm out of line thinking these aren't normal. I would play with the hammer spring if I planned on keeping it but since Im returning it I'm not touching anything so as to not have the chance of being told that I messed it up by adjusting things. 

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    nervoustrig
    Participant
    Member

    It’s totally normal.

    Normal for a regulated PCP that needs the HST dialed in. :)

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    SilentSquirrel
    Participant
    Member

    Dairyboy

    Ok just wanted to clear some things up here. My point of this post is NOT about the gun in question at all. What I'm asking simply is that do these string look ok or normal to you for a regulated gun and that it's fine as is. These guns are very nice guns and I actually really like this one alot. The best bullpup I've owned overall minus the reg issue but it's not the point of this post. I've got a RMA for the gun now and will be returning it. But from what I was told over the phone the shot strings looked "normal". All I'm asking is if I'm out of line thinking these aren't normal. I would play with the hammer spring if I planned on keeping it but since Im returning it I'm not touching anything so as to not have the chance of being told that I messed it up by adjusting things. 

    So essentially; the folks you bought it from said the shot strings looked OK, but out of the kindness of their hearts were willing to issue an RMA anyway.

    Does that come close?

     

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    TarheelScott
    Participant
    Member

    TarheelScott

    I do not like the shot string at all lol. No where near what I would have hoped for if it doesn't improve at all in a full 2 tins I would be on the phone with the dealer. I would run the tins pretty quick and not wait very long even if i was just cronoing in the garage or barn at a very short distance 25 feet or less. I would just get some lead through it quickly and see if there were any change if not a phone call would go out.

    👍 I will stick with my original post lol. I do not like the shot string. Good call on leaving it all alone so it can't be blamed on you. I hope it all goes smooth with the RMA . JMHO lol😋

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    Dairyboy
    Participant
    Member

    I've owned many different regulated airguns and have never had one drop fps that drastically regardless of where the hammer spring was set.

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    Microgun
    Participant
    Member

    Dairyboy

    From yesterday a shot group with the 16gr (first shot was way low as I had the gun by a heater wondering if the colder temps were messing with it so air pressure in the plenum was high so I erased them) 

    Saved Chrono Group – 12-15-2019 03:26:59 PM
    Created: 12-15-2019 03:26:59 PM
    Description: 
    Notes 1: 
    Notes 2: 
    Distance to Chrono (FT): 3.00
    Ballistic Coefficient: 1.000
    Bullet Weight (gr): 16.000
    Altitude (FT): 0.0
    Temp: 55 °F
    BP: 1024.00 inHG
    Shots
    #     FPS        FT-LBS     PF
    9     913        29.62      14.61     
    8     922        30.21      14.75     
    7     925        30.40      14.80     
    6     928        30.60      14.85     
    5     936        31.13      14.98     
    4     933        30.93      14.93     
    3     946        31.80      15.14     
    2     929        30.67      14.86     
    1     967        33.23      15.47     
    Average: 933.22
    StdDev: 15.65
    Min: 913
    Max: 967
    Spread: 54
    True MV: 933.54
    Shots/sec: 0.50
    Group Size (IN): 0.00

    Followed by a mag with the 18gr immediately after

    Saved Chrono Group – 12-15-2019 03:27:55 PM
    Created: 12-15-2019 03:27:55 PM
    Description: 
    Notes 1: 
    Notes 2: 
    Distance to Chrono (FT): 3.00
    Ballistic Coefficient: 1.000
    Bullet Weight (gr): 18.130
    Altitude (FT): 0.0
    Temp: 54 °F
    BP: 1023.00 inHG
    Shots
    #     FPS        FT-LBS     PF
    12    851        29.16      15.43     
    11    838        28.27      15.19     
    10    844        28.68      15.30     
    9     854        29.36      15.48     
    8     857        29.57      15.54     
    7     861        29.85      15.61     
    6     863        29.99      15.65     
    5     865        30.13      15.68     
    4     871        30.55      15.79     
    3     874        30.76      15.85     
    2     874        30.76      15.85     
    1     885        31.54      16.05     
    Average: 861.42
    StdDev: 13.53
    Min: 838
    Max: 885
    Spread: 47
    True MV: 861.71
    Shots/sec: 0.41
    Group Size (IN): 0.00

    just curious why you write your first shot last and last shot first. i feel like im reading chinese…lol. my unreged hatsan flashpup shot more consistent than that. now it has a huma regulator and its pretty amazing for $300 bucks

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    Rj
    Participant
    Member

    I normally agree with Jason. But how many cc air tube on the uragan? Its a massive amount. I almost bet if you kept shooting, it would keep declining. You  an back the hammer spring out and see if it flattens out. Go a full turn at least to see if makes a difference. But even the piss poor reg on the nova liberty wasn't that bad. In my experience, which isn't worth a plug nickel. A creepy reg will at least flatten out after 5 shots. Its acting like the washers are close to coil bind or the likes.

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    nervoustrig
    Participant
    Member

    Yes, I gladly concede there may be other issues but I was simply advocating trying a simple and completely noninvasive adjustment to establish a proper baseline.  Quite possible it would have then become obvious that something else remains.  

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    TarheelScott
    Participant
    Member

    nervoustrig

    Yes, I gladly concede there may be other issues but I was simply advocating trying a simple and completely noninvasive adjustment to establish a proper baseline.  Quite possible it would have then become obvious that something else remains.  

    Your input is always welcome lol. you have helped alot of us . Thank you for that.

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    Rj
    Participant
    Member

    nervoustrig

    Yes, I gladly concede there may be other issues but I was simply advocating trying a simple and completely noninvasive adjustment to establish a proper baseline.  Quite possible it would have then become obvious that something else remains.  

     

    Absolutely, no disrespect Jason. And it doesn't cost a cent and a couple seconds to try.

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    nervoustrig
    Participant
    Member

    No problem guys 👍.   A tornado just blew through town and the power is out so I’ve nothing to do this evening but browse the forum and offer troubleshooting tips to people who didn’t ask for them :)

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    TarheelScott
    Participant
    Member

    😂😂😁 I am thankful ! 

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    Raden1942
    Participant
    Member

    When nervous speaks I tend to listen. That man saved me quite a bit of fuss on more than one of my guns. hes not as cool as this guy my daughter drew but maybe as close to an airgun expert as us uninitiated agn guys get. 😉

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