1. The Forum Rules have undergone some minor changes and updates.  Please take the time to read them; it will only take a couple of minutes of your time. By doing so, you lessen the chance of incurring the wrath of the moderation team or making yourself look foolish to other members.

    90% of users posting adverts in the Sales forums need to be reminded to read the rules as their posts are wrong.  This is unnecessarily time-consuming and will no longer happen - if your advert doesn't follow the Sales Rules it will be deleted and you'll have to start all over again.

    To close this box once you've read it (and the Rules), click on the X in the top right-hand corner.

    Thank you.

    AGF Staff



    Dismiss Notice
  2. A reminder of one of the Forum Rules:

    'Behaviour

    Do not make inappropriate or offensive posts - including threats, harassment, swearing, prejudice, defamation, deliberate insults or name-calling, other negative remarks about this forum, its moderators and administrators or your fellow members. Even if this is just your own personal opinion, RESPECT YOUR FELLOW MEMBERS.'

    There have been changes made to our censoring software in an attempt to help with this growing problem.

    Click the X in the top-right-hand corner to dismiss this notice.
    Dismiss Notice
  3. Dear members,

    Our membership (like our country) consists of people from all walks of life; different in far more ways than can be listed here and each with a different view based on their experience of life - regardless of their colour, religion or cultural heritage. Every single person in the UK has been born of mixed race – we are a multi-coloured and multi-cultural country.

    As many of you are aware there are a handful of individuals amongst this membership that persist in making provocative, inflammatory, racist and otherwise offensive comments. This has been happening across the forum to a certain degree but is most especially prevalent in the Adult section.

    The moderation team has tried to stay on top of this, however unfortunately because of the ‘offensive’ nature of much of its content we don’t monitor the Adult section quite as much as perhaps we should. As a result much of this behaviour has gone unnoticed unless it has been reported to us. While the team always intended to take a "light touch" approach to the Adult section it would seem that some people aren’t quite adult enough to be left unmonitored after all.

    This behaviour is, and always has been against Forum Rules as well as the specific stipulations of the Adults forum and it will no longer be tolerated. We feel it's time to draw a line in the sand and as such from this point onward offenders will receive an immediate and permanent ban from the forum.

    In order for us to achieve our goal of restoring the forum to the friendly and tolerant place it once was, we ask that ALL members be mindful of the content they post and help us to stop unacceptable behaviour by using the 'Report' tool at the bottom of any offending post - the results of which can be seen only by Admin/Moderators.

    You should all receive a copy of this message by PM. 

    To close this message box, click on the 'X' in the top-right-hand corner.

    Dismiss Notice
  4. Hotmail block emails from us entering your inbox. Unless you can setup a safe sender you will not get activation emails from the forum. Please use an alternative provider or complain to Hotmail.
    Hotmail addresses include.

    @Hotmail.co.uk @Hotmail.com @outlook.com @Live.com
    Dismiss Notice
  5. Postings on Politics, Religion & Controversial Off-Topic Material

    The majority of users do not want to read about these subjects and people have left the forum as a result of it – this is after all an 'Airgun' Forum. It’s all very well to say they don’t have to read it if they don't want to, but as most of us use the ‘New Posts’ button there is no easy way to avoid it.

    All AGF staff members are in favour of people being able to discuss what they want, but we have to draw the line somewhere if it is upsetting other users. We don’t want to read about these topics either.

    IMPORTANT- The discussion of politics and religion is no longer allowed anywhere on the forum (including the Adult section).  The only exception is if it's airgun related - they must be put in the Airgun Related Politics section..

    We will not tolerate bullying or personal attacks, racism or any other offensive 'isms'. we will remove these topics from the forum, we will not give you an area where you can abuse each other. We will not hesitate to ban offenders.

    To clear this text box, click on the 'X' in the top right-hand corner.

    Dismiss Notice

The importance of checking your guns via the ole chrono

Discussion in 'Anything Airgun Related' started by Big Uli, Aug 3, 2014.

  1. Big Uli

    Big Uli Donator

    Messages:
    654
    Likes Received:
    2
    Location:
    Gretton, Northants-Leicestershire Border
    After one hell of a shock yesterday with my S410 running hot using Bisley mags and JSB exacts I've been down Kibworth today and got Richard to put it over the crono using JSB exacts
    Came up at 9.7 :eek:
    WTF
    Took it home and checked with my crombo and see there, it was putting out 9.7
    At least I know my combro is accurate as that was a major worry to me as having a inaccurate chrono just invites trouble with plod

    Striped the hammer assembly down and I was amazed at the amount of sticky residue all over.
    I can only assume that the hot sun in the back of the van softened all the gue enough for it to run hot

    Cleaned it all off and gave it a polish, then wipe with VP90 and reassembled it. Now shooting a very steady average of 707.5 feet per second with .177 bisley mags

    Done the same to my S400 and that is even more consistant at787.5 feet per second using .177 JSB exacts

    I'm happy with those results

    What it shows is that you should never assume your gun is within save limits
    Keep checking periodically to be on the save side
    Should anything go wrong and you find yourself in a situation where Plod checks your gun it is best to be confident you are not going to get into any bother
     
  2. stevemandm

    stevemandm Honorary Member

    Messages:
    8,272
    Likes Received:
    830
    Location:
    in a distant galaxy, far far away ....... actually
    good advice . the first tool in a shooters collection should be a chrono/chrony etc
     
  3. Scope.22

    Scope.22 Engaging Member

    Messages:
    237
    Likes Received:
    6
    Location:
    Wendover
    9.7? Isn't the max 12 though? Or am I being a nob and missing something here...
     
  4. Ganton Gunner

    Ganton Gunner Super Duper Moderator Staff Member Mod/Admin

    Messages:
    12,842
    Likes Received:
    103,330
    Location:
    Ganton scarborough
    12 is the legal limit yes
    maybe a typo or his wording :confused:
     
  5. mattyts

    mattyts Donator

    Messages:
    6,201
    Likes Received:
    163
    Location:
    Yorkshire
    Maybe it was 97 ftlb :eek:
     
  6. dave goodall

    dave goodall Donator

    Messages:
    2,919
    Likes Received:
    179
    Location:
    Calderdale
    Or if uread it right it was hot befor been put in back of the red hot van where the grease melted giving the 9.7 once at kibworth
     
  7. Big Uli

    Big Uli Donator

    Messages:
    654
    Likes Received:
    2
    Location:
    Gretton, Northants-Leicestershire Border
    It run hot yesterday after spending all of the day in the van after an early morning on the range
    This morning it was at 9,7
    Only explanation I can come up with is the residue softening enough to allow it to run hot
    We all know too much grease turns to sticky gunk in time

    There is no way heat will expand the air to make it run 2 ft/lbs higher
    That may happen with co2 but not air

    If there is another possibility I can't think of it
     
  8. Scope.22

    Scope.22 Engaging Member

    Messages:
    237
    Likes Received:
    6
    Location:
    Wendover
    I'm still not following, I thought 12 was the max?
     
  9. Pidlar

    Pidlar Big Poster

    Messages:
    3,637
    Likes Received:
    664
    Location:
    Kingwinford
    It is! If I read it correctly his Rifle has returned to 9.7 after going over after being in a hot van!
     
  10. Clanktank

    Clanktank Member

    Messages:
    24
    Likes Received:
    0
    Location:
    Swindon
    I think you're all getting confused with feet-per-second (fps) and lb/ft.

    He's saying it was shooting at 9.7 (970) fps, which equates to 17.64 ft/lbs with 8.44 grain JSB exact pellets. Totally illegal without FAC.

    After stripping and cleaning it was at 787.5 fps, which equates to 11.63 ft/lbs, so within the legal limits of 12 ft/lbs.
     
    Last edited: Aug 4, 2014
  11. timmytree

    timmytree Pro Poster

    Messages:
    7,892
    Likes Received:
    11,744
    Location:
    Pedwell
    What planet are you on? 970 fps? Absolute bloody rubbish. Go back and read the original post and stop confusing the issue.
     
  12. Meteor62

    Meteor62 Major Poster

    Messages:
    9,029
    Likes Received:
    1,775
    Location:
    Coventry
    To be honest I thought he was complaining that it was only running at 9.7 ft lbs and it was the hot weather that had affected it and after a strip down and reassemble all was now well. If he had said 970 fps it would have explained things better.
     
  13. kermitboy1

    kermitboy1 Banned

    Messages:
    5,126
    Likes Received:
    6
    Location:
    Essex
    This is why I love this forum so much. Keep it up lads, its great fun to read. Love these replies. KB1
     
  14. turnipcruncher

    turnipcruncher Donator

    Messages:
    51
    Likes Received:
    0
    Location:
    Gloucester
    He went to range in the morning rifle was cool and normal.

    he then placed rifle in van and it was warmed via sun.

    after this he checked it with his combro and it was knocking on or over the legal limit, (no figures are given,assume 11.99ftlbs) but thought his combro was lying to him because there cheap and it was ok in the morning at the range.

    The next day when the rifle was cool he got Richard to check it on a proper chrono, it was at 9.7ftlbs
    surprised !!!! at now low the power had now become, he checked results with his combro and produced same results, thus creating faith in his chronos results and also proving his gun was running hot after getting hot!

    he then did a strip down to reveal a sticky residue ;) he cleaned this up and re assembled gun.

    the gun is now shooting back up at a consistent power that he is happy with!

    although he hasn't re warmed it in the van to check?!

    thats kinda what I get from the posts!

    moral of the story....

    like dogs in warm weather it's also better if you leave the windows down on your vehicles when you have rifles in the back and park in the shade!!!!
     
  15. Whistler

    Whistler Donator

    Messages:
    212
    Likes Received:
    0
    Location:
    Devizes, Wiltshire
    Great advice :)
     
  16. Stevie Darling

    Stevie Darling Sexual tyrannosaurus

    Messages:
    18,690
    Likes Received:
    12,464
    Location:
    St. Andrews, Jockland.
    That's a bit harsh on yerself mate,

    calling yourself a nob:):):)
     
  17. SteveO

    SteveO Top Poster

    Messages:
    11,080
    Likes Received:
    10,170
    Location:
    Kek
    Well done TC - thanks for the translation! :up:
     
  18. Scott srs

    Scott srs Well-Known Member

    Messages:
    75
    Likes Received:
    0
    Location:
    Manchester
    You could not leave them in the car windows up or down in manchester
    it would have been stolen and sold to some little scrote within 10 mins
     
  19. funkedup

    funkedup Engaging Member

    Messages:
    275
    Likes Received:
    331
    Location:
    Peterborough
    thats even when you are driving along!
     
  20. rabbitraider1

    rabbitraider1 Engaging Member

    Messages:
    270
    Likes Received:
    1
    Location:
    Burton DE14
    I like to leave my door open when my rifles are in there to keep them cool and a sign saying theres guns getting to hot in the back seat so any passers by can give them a fanning and possibly a sip of water ;)
     

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice