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Question Testing Air Arms S510

Discussion in 'Anything Airgun Related' started by Natgun, Feb 6, 2014.

  1. Natgun

    Natgun Well-Known Member

    Messages:
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    Location:
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    Hey guys,

    When I purchased my AA S510, I was under the impression the window of usable shots was around 80. I was also advised to fill/refill 170-110.

    From my shot test I'm seeing pretty good power all the way from 200 (10.8 F/Lbs) down to 111 (10.4 F/Lbs) with a peak of 12.0 (ish)F/Lbs.

    I actually had 119 shots before going lower than 10 F/Lbs.

    Even with my gun down to 100, I was still hitting pretty consistent power all above 9.4+ F/Lbs.

    What would you guys say is usable power?

    Air arms S510 Power test.jpg
     
  2. bobby123

    bobby123 Member

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    What calibre is it ?
     
  3. Natgun

    Natgun Well-Known Member

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    . 177
     
  4. mattyts

    mattyts Donator

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    Are you going to de-tune the power? 1 of those shots is FAC and 2 others smack on 12 limit.

    I would be happy with anything above 10.5 and anything below 11.5
     
  5. Natgun

    Natgun Well-Known Member

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    Generally speaking, it seems the gun is perfectly tuned. If I had used the weight information on the tins of pellets they would all be well in. I'm thinking the scales might be over weighing the pellets, they were only cheap Chinese made.

    The tin of pellets were 0.45g... but individually weighed...

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    [TD]0.467[/TD]
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  6. Natgun

    Natgun Well-Known Member

    Messages:
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    Location:
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    If I enter the generic information it looks like this...

    AA S510 With generic weight.jpg
     
  7. metalman

    metalman Big Poster

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    And the pellets in question were ?
     
  8. Natgun

    Natgun Well-Known Member

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    They were some RWS Hobby.. cheap.. £3 a tin!
     
  9. engraver

    engraver Keyboard Hero

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    Plenty of shots their mate, double of my .177 hw100.

    Im thinking of buying the airarms ultimate sporter following this.

    I owned a pcp that was plenty usuable at 10ftibs, even on a full on FT course, so your gun looks good for 100 shots or so, but remember hobbies are very light weight, a heavier pellet will push your gun over for a bigger percentage of the charge.
     
    Last edited: Feb 8, 2014
  10. metalman

    metalman Big Poster

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    It would appear the gun is over the limit, would hate to think what reading you would get with BisMags, as has been said before, needs detuning
     
  11. Dan77k

    Dan77k Donator

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    Location:
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    What chrono are you using? Is it a Combro and if so, has it been calibrated with the supplied reference number? If not, it could be skewing all your results.
     
  12. Natgun

    Natgun Well-Known Member

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    It was an Chrono F1, I know there would be an operating tolerance for it plus the scales used would also have a tolerance. I will run another Pellet later and see if I get similar results.
     
  13. mark112

    mark112 Engaging Member

    Messages:
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    Location:
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    Hi,

    Seems to me rifle is fairly well set up asides from (possible/likely) over-power issues. Tweaking it down may give even more shots! Good spread of shots and fairly flat curve especially for .177 as well. Any chance of seeing the shotstring values in FPS for those of use who dabble with spreadsheets?

    Mark
     
  14. Natgun

    Natgun Well-Known Member

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    I tried to upload the actual spreadsheet but the forum shows Excel as an invalid file, so I attached the graph separate.



    AA S510 FPS.jpg
     
  15. mark112

    mark112 Engaging Member

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    Location:
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    Hi,

    It seems to me that the absolute best shots, ignoring the odd spike, are are between numbers 35 to 90(ish) This equates to around 175-135 bar and 55 shots. For general practice there's a perfectly good range between 180 to around 100 bar. Below 100 bar things drop of fairly quickly. Pretty good results.

    You may also find other pellets give a less spikey curve. AA Diabolo fields seem pretty good in my own S400 and S410. Polishing the hammer rail may also yield similar improvements. Oddly enough my 2005 model S410 Carbine in .22 yields the best results for me with a spread of around 15fps between 190 and 90 bar and never more than 4fps between shots. Trying to get my .177 S400 the same! That said the S400 is the most accurate and still a joy to shoot.

    Don't need a spreadsheet just a list of fps values would have done :)

    Mark
     
  16. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    From that shot string I'd say the rifle definitely wants to go back - the peak reading of (what looks like) 875ft/s gives an energy value of 11.9ftlb and Hobbies are about the least efficient pellet you could put through a PCP.

    I've just put a few Hobbies and Exacts through my S410 (same valve gear, barrel length and calibre as your S510), giving energy values of 9.76 and 10.63ftlb respectively (yeah, I know it needs a new valve and a tune).

    The energy from the Exacts is nearly 9% higher than the Hobbies. Even discounting the one high velocity from your string, a 9% increase in the peak energy would put you at around 12.6ftlb.

    This is further backed up by the fact that at 1.5% velocity variation you're only getting around 45 "good" shots per charge - a decent S410k will do that with 30% less air.

    Put some JSB / Daystate Heavies through it if you really want to scare yourself ;)
     
  17. Natgun

    Natgun Well-Known Member

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    Now you have me concerned, I tried other target/flat pellets which for the best part all stayed under the limit although still close. In fact from my total testing only 2/250 shots have ever clearly exceeded the limit so far and it feels like the more lead goes down the barrel the less power in the results like it's still bedding in.

    I think some more testing needs to be done with pellets like you mention! If I could shoot even close to 12.6 ftlbs, I would be very concerned.

    I don't understand how a new gun can even exceed the limit, surely Air arms would be leaving themselves open to investigation if my readings are accurate?
     
  18. Natgun

    Natgun Well-Known Member

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    Since my original tests above where I individually weighed and recorded every pellet I shot, I've re-tested my Air arms S510 but this time I weighed 20 pellets at random, found the average and selected out pellets which were equal weight +/- 0.001g. Also, I scraped the flat pellets and used domed "Power force" this time in case of inefficiency with the shape.

    My test results this time all came in under 12 F/lbs with a maximum of 11.73 F/lbs. I ran the Cylinder pressure between the optimum 170-140 bar.

    Power test AA S510 170214.jpg

    Also, I thought I would run the other guns (the good, the bad and the ugly) over the Chrono.

    Clearly there is a good reason to own PCP guns, and the Webley Valuemax which had shots drop as low as 3.5 F/Lbs, I can only think that the pellets didn't really suit the gun, they felt a little tight when loading, clearly inconsistent shooting.

    And the Walther CP88... well.. 1.4 F/Lbs, it is a really old pistol which has been sat in my loft for 12+ years and never been serviced, couldn't expect too much!

    The gas ram Gamo whisper was nice and consistent though, .22 BSA Elites. I actually enjoy firing this rifle, it has a pleasant recoil and it's reasonably accurate considering I could nearly buy 3 of them for the price of the cheapest PCP!

    Power test 170214.jpg
     
  19. cloverleaf

    cloverleaf Super Moderator Staff Member Mod/Admin

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    Those results certainly look more promising than your last lot and the Power Force pellets seems a lot more appropriate for the gun. That said AA test the guns with their own (8.44gn) pellets and JSB / Daystate Heavies will most likely produce the most energy; so best to check with these to be sure ;)
     
    Last edited: Feb 17, 2014
  20. Natgun

    Natgun Well-Known Member

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    Yeah I was thinking that JSB's will be the next test just for piece of mind.
     

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