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chronoscope

Discussion in 'Anything Airgun Related' started by stu s410, Feb 26, 2008.

  1. stu s410

    stu s410 Engaging Member

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    Hi chaps, went out today and got my first lamp and chronoscope. The lamps excellent, i got a Deben mini pro. The chrornoscopes (cb-625 mk4) seems good. However Once I'd followed all the instructions and used it on my s410 its coming out at 10 to 10.3 ft.lbs @ 150 bar and 9.5 ft.lbs @ 200 bar. I was hoping for more like 11.5 ftlbs. Any suggestions, cheers Stu.
     
  2. topcat

    topcat Posting Addict

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    try 170 bar
     
  3. stu s410

    stu s410 Engaging Member

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    Hi topcat, just tried 170. Its @ the 9.9 mark.
     
  4. Andy

    Andy Administrative Staff Member Founder

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    What weight pellets you using.
     
  5. Buzz

    Buzz Banned

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    Look on the bright side, it would appear from your figures that the energy output of your gun is inversely proportional to the pressure in the tank. It would therefore mean that when the tank is empty you should be getting around 200 ft/lbs and need a FAC for it !!! LOL
     
  6. stu s410

    stu s410 Engaging Member

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    AA field .22-15.85 gns
     
  7. Andy

    Andy Administrative Staff Member Founder

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    Sounds like your gun gun do with the power taking up a bit then.
     
  8. stu s410

    stu s410 Engaging Member

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    Its only 8 months old. Would the shop i got it from deal with it for nothing. Plus how do they go about doing it. Is it a job for a gunsmith or is it some sort of internal ajustment. Cheers Stu.
     
  9. Andy

    Andy Administrative Staff Member Founder

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    To make small adjustments it used to be just a grub screw to turn, but with all the anti tamper these days i don't know if this is still the case.
     
  10. topcat

    topcat Posting Addict

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    if its the new nodel aa 400 it as antitamper so you cant up the power if you told air arms how low it is they should put it right under warranty
     
  11. EX Mod Cog

    EX Mod Cog Keyboard Hero

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    If only :rolleyes:
     
  12. stu s410

    stu s410 Engaging Member

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    Its only 7 months old, its got the deluxe thumphole stock. I had a small leak a couple of weeks back so I took it back to the gunshop. It was leaking from the pressure gauge, so he took it himself to AirArms as he was going that way anyway. They put a new seal on the gauge and checked it all(not sure if they checked the muzzle energy) and everything was great. So with any luck he may do it again. He dosen't work wednesdays so I left a message. Ill let u no what happened, cheers Stu.:up:
     
  13. topcat

    topcat Posting Addict

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    you should phone air arms and tell them yourself what is happening and your not happy ask for it to be running at 11.5 at the peak of its power curve
     
  14. stu s410

    stu s410 Engaging Member

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    Spoke to my gun dealer today. Im going to take it in tommorow and run it through his chronograph (one of those 100 quid jobs) and see what reading we get. He's also going to call AirArms on my behalf, say me the bother. Stu...
     
  15. stu s410

    stu s410 Engaging Member

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    Finally got to test my s410 on my gundealers chronograph. It came out the same and as luck would have it I've got a adjustment screw on the side of the firing valve body on the opposite side of the mag. He removed the cover screw and adjusted the internal screw(anti-clockwise ups the pressure and clockwise down). Theres a picture of it on the bottom of page 6 in my user guide except its a brass knob. There is however no sight or mention of it in the parts list at the back. took it up to 11.6 ftlbs @ 140 bar. Now I can actualy feel a small amount of recoil. Happy hunting Stu.
     
  16. milo2005

    milo2005 Engaging Member

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    stronger hammer spring would do the trick,but it will take it over 12 for sure.this is what i did to my mates s140 it now shoot at 20ft/lb with aa field lol

    but make sure you get a fac if you do this or it is 5 years in the queen's hotal for ya lol:(:(:(
     

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