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

5.5mm or 5.56mm pellets - Different bore measurements

Discussion in 'Anything Airgun Related' started by Dunkman, Jun 26, 2012.

  1. Dunkman

    Dunkman Posting Addict

    Messages:
    1,678
    Likes Received:
    13
    Location:
    Monmouth
    Has anyone wondered why some barrels prefer 5.5mm pellets and other 5.56mm?

    Well the simple is answer is how the actual .22 bore is measured during manufacture

    In Europe, they measure .22 of an inch from GROOVE to GROOVE in the rifling

    In the rest of the world (Uk and America mainly) they measure from LAND to LAND in the rifling

    The depth of the rifling marks is the difference in actual bore size.

    So, hope that helps people understand why some pellets are a snug fit and other rattle around in the breech.
     
  2. T 20

    T 20 Busy Member

    Messages:
    882
    Likes Received:
    54
    Location:
    I'm over here, Dave
    That's not quite right Dunkman

    Old English barrels are generally accepted to be 5.6mm not 5.56mm.

    5.6mm being 4/1000 of an inch bigger than 5.5mm

    This is why .22" Eley Wasps used to be sold in 5.5mm and 5.6mm sizes.

    It is said that early .22" HW35s were fitted with 5.6mm barrels specially for the UK market.





    All the best Mick
     
    Last edited: Jun 26, 2012
  3. Dunkman

    Dunkman Posting Addict

    Messages:
    1,678
    Likes Received:
    13
    Location:
    Monmouth
    Maybe the varience of 5.56-5.6mm but it was interesting to see that there is no std measurement used across the globe.
     
  4. T 20

    T 20 Busy Member

    Messages:
    882
    Likes Received:
    54
    Location:
    I'm over here, Dave
    I think they're getting there now Dunkman. :)

    Webley seem to have gone to 5.5 with the Hawk range.

    Air arms sidelevers used a 5.5mm European barrel.

    But I wonder if the newer BSA Lightning barrels are 5.5mm now as I wouldn't mind buying one if they are for my ratting Mercury.
    It would give me a better choice of pellets and hopefully allow me to use my favourite ratting pellets --- Hobbies. ;)





    All the best Mick
     
  5. stevemandm

    stevemandm Honorary Member

    Messages:
    8,157
    Likes Received:
    448
    Location:
    in a distant galaxy, far far away ....... actually

    thats not quite right mick.
    5.6mm being 3.93700787/1000 of an inch bigger than 5.5mm.

    soz mate, couldnt resist !
     

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