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Advice calerbrating my ultra

Discussion in 'Anything Airgun Related' started by sillygarry, Jul 8, 2014.

  1. sillygarry

    sillygarry Posting Addict

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    hi guys
    i tried to calibrate my ultra .22 the weekend zero'ed @ 30yds fine then when i tried to calerbrate the mildots at 5yds intervals the pellets were going all over the place in the end i gave up there was to many wayward pellets to be flyers i kept the air pressure topped up and the shots were sitting down and rested what can cause this help please
     
  2. Tim_B

    Tim_B Major Poster

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    so they weren't grouping at all? maybe start with checking that everything is tight, clean the barrel...30 pellets and try again? Also, maybe they aren't the pellets for rifle and you need to do further testing with pellets

    cheers
    Tim
     
  3. milek

    milek Honorary Member

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    Intervals closer or further than 30 yards?
     
  4. 177

    177 Donator

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    Proper mil dots are usually miles out in terms of 5 yard increments.

    Have you considered parallax error or eye alignment issues ?

    Often when folks start "walking" down through the mil dots their cheek weld and eye alignment can go out of whack.

    Easy way to tell is to shoot using the centre cross hairs again and if your pellets group it's you. If they don't, it's more likely to be something to do with the rig.

    Also consider that many mil dot rets have pretty big dots so precision aiming can be a little tricky.
     
    Last edited: Jul 8, 2014
  5. Ganton Gunner

    Ganton Gunner Super Duper Moderator Staff Member Mod/Admin

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    I blame the shooter ive heard he can be silly ;)
     
  6. sillygarry

    sillygarry Posting Addict

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    35,40,45 and at 20yds
     
  7. sillygarry

    sillygarry Posting Addict

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    not guilty your honer:moon:
     
  8. Ganton Gunner

    Ganton Gunner Super Duper Moderator Staff Member Mod/Admin

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    im guessing if it is the longer ranges your having problems with its either you or the pellet so maybe hope for the latter and try a different pellet
     
  9. clbarclay

    clbarclay Engaging Member

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    How tight/consistent (not accurate) are the groups if you just aim with centre of the cross hair at the middle of the targets at different ranges?
     
  10. gasman

    gasman Up a bit,,,,,,,

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    1 , what pellets you using mate
    2 , check your probe o-ring
    3 , chrony gun check fps consistency
    4 , get a real gun something in .177 :p
     
  11. Ganton Gunner

    Ganton Gunner Super Duper Moderator Staff Member Mod/Admin

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    I would pay the most attention to tip no 4 :D
     
  12. sillygarry

    sillygarry Posting Addict

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    i think your right on number 4. went to west london rangers to shoot hft last weekend and noticed something was not right :mad:
     
  13. metalman

    metalman Big Poster

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    With matching handbag :D
     
  14. 177

    177 Donator

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    There's enough mincing fairies in the world without unnecessarily swelling their *ahem* ranks :rolleyes:

    Just get what you've got sorted and learn how to get the best out of it :rolleyes:

    If I changed my gun(s) every time a problem (real or imagined) cropped up I'd have wasted even more money than the fortunes I already have on my shooting over the years :rolleyes: ;)

    Q: My car has a problem
    A: buy a different one, but with a bigger/smaller engine

    Q: I have a problem with my partner - what do I do ?
    A: buy a different one, but with a bigger/smaller...

    OK, so that wasn't a great example, but you get the overall drift :)

    Get it fixed if it's pooched and then get it set up right. By all means flip it for something else if you decide it somehow isn't doing what you need it to but, until or unless you reach that point, all you have is a problem to overcome. No big deal.
     
  15. terry1001

    terry1001 Major Poster

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    I'd start by checking for grouping at the various ranges using the centre of the reticle, not worrying about the shots being high or low, so that you can be sure that the rifle will shooy acceptable groups with your choice of pellet.
    With mildots you will have problems if you change the scope magnification so you need to decide if you want to set the zoom so that the dots correspond to particular ranges (use Chairgun to get an idea of this) or if you want to check which dot you need to use at various ranges. Either way it's probably easier to stick with one zoom setting at least until you get the hang of using the dots.
     
  16. sillygarry

    sillygarry Posting Addict

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    hi terry
    thats what i was doing shooting on cross airs and measuring the pellet drop at different measured ranges but the pellets would not group 1 or 2 would group then the next 2 would be 50mm higher, today i had the gun chrono weighed 9 pellet@16g lowest fps 559.44 highest 564.17 with a spread of 4.73 fps which seems fairly consistent at 11.3 flb so i am most confused:(
     
  17. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

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    Any silencer clipping going on??
     
  18. terry1001

    terry1001 Major Poster

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    If you're getting decent groups out as far as 30 yards and then you start to get fliers at longer ranges you probably need to try some different pellets. There's nothing wrong with your shot to shot consistency so maybe the pellets aren't stable beyond 30 yards - or it could be your shooting I suppose?
     
  19. milek

    milek Honorary Member

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    I used to use Daystate LI's which were exceptional at 30 yards but groups would open up considerably past 35 yards. Was your 20 yard ok?
     
  20. tobys

    tobys Engaging Member

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    Yep, longer ranges is where pellet/barrel mis suiting shows up. I used to use FTT in my S510 (not a BSA but just an example) and was great at 25yd zero but at longer ranges groups opened up, now AAF 4.52 much better.
    Another issue i found was gun angle for longer ranges, just cos of the piece of land i was on, as i moved back i was on a slight slope and when prone it made me less stable ( i was moving myself back - not the target board).
     

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