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Advice Onc again, need advice

Discussion in 'Anything Airgun Related' started by AirArms456, Jun 4, 2014.

  1. AirArms456

    AirArms456 Junior Member

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    Location:
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    After the arrival of my new hawke sport HD 4-12x50 AO IR scope, i thought that i would throw it on my Air Arms s410, and put it through its paces, and all i can say is that i am very impressed indeed. Anway i pumped the rifle up to 180 bar as i was testing out some H and N field target trophy, and after around ten shots the gun was running consistently and it was shooting bob on at 30 yards, i ran the pressure down to around 140 and then called it a day, after about an hour i then got "the urge" to go out and have another play, so once again i pumped it up to around 180 and started plinking once again, but the zero had moved down and left about half an inch? is that to be expected? or could that just be down to the fact that i havent found the sweet spot of the gun yet due to no chrono? any advice would be helpful, its just quite annoying when you have to zero your rilfe everytime you want to go out and have a play!

    cheers

    isaac
     
  2. Cymru-Dave

    Cymru-Dave Donator

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    I don't own a PCP but I'd have said it was possibly knocked or something may need tightening on scope (but not too much).
     
  3. terry1001

    terry1001 Major Poster

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    The zero shouldn't change but it's good practice to check your zero before every outing as things can get knocked etc. You should check all your mounting screws etc to make sure that it's properly mounted and firmly in place. It's well worth checking where your sweet spot is, best way is with a chrono but you can check it by shooting and noting where the point of impact changes - between 120 and 180 bar should cover it but every rifle is slightly different.
     
  4. AirArms456

    AirArms456 Junior Member

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    i checked that everything was tight when i was putting the scope on? and at 180 it seemed a bit off and started to get better at around 165-170, but it just seems to be that everytime i re-charge the gun it goes knackered again?
     
  5. yorkshireshoot

    yorkshireshoot Posting Addict

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    It will change slightly as pressure drops but not by much unless your running it down to 100- bar . As said check all screws done up fairly tight , also if your guns new or changing pellet type I'd give the barrel a pull thru mate .
     
  6. AirArms456

    AirArms456 Junior Member

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    have done mate, but saying that i didnt lead the barrel up again before trying some groups, but it should now be all leaded up as i have shot around 50 pellets + through now, i really need to find the sweet spot dont i!
     
  7. trumpetier

    trumpetier Pro Poster

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    yep 165_170 is were its at on my 400
     
  8. AirArms456

    AirArms456 Junior Member

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    a couple of people have said thats where it usually is on s410's and s400's, it seems alot more powerful when its at that fill pressure aswell!
     
  9. mark112

    mark112 Engaging Member

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    Hi,

    Check that the two grub screws that hold the front barrel band on are nipped up tight. Usually its something as simple as this. At 30 yards differences in fill pressure should make virtually naff all difference to impact point.

    Mark
     
  10. AirArms456

    AirArms456 Junior Member

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    chhers for the input mate, and yeh i bet it is something along those lines! i have arranged to borrow a chronograph on Friday so will get to the bottom of it then!
     
  11. yorkshireshoot

    yorkshireshoot Posting Addict

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    Try jsb exacts and aa fields too mate my410 loves em both but didn't get on well with the h and n .
     
  12. robs5230

    robs5230 Oversprung

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    if you have a slip on silencer / adapter fitted, try removing the silencer then checking again.
     
  13. AirArms456

    AirArms456 Junior Member

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    I can't get the bloody thing off pal!!!!
     
  14. tomsteebs

    tomsteebs Donator

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    My thoughts, your scope is canted and not mounted straight vertically/horizontally. As a result when your power fluctuates it will be going both left or right and up or down.
    Have you tested your sweet spot of your rifle?
     

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