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

Gamo Gx 40 Power Curve

Discussion in 'Anything Airgun Related' started by Nobby, Oct 20, 2019.

  1. Nobby

    Nobby Posting Addict

    Messages:
    1,540
    Likes Received:
    1,250
    Location:
    Shebbear, North Devon
    One of our members bought himself one of these rifles and brought it to the club today saying that it was inconsistent. He's only had it about three days.

    He told me - and I didn't check - that the handbook says you can fill to well over 200 bar. He filled it to 200 bar and we put it across the SKAN chrono.

    3 point something foot pounds.

    A dozen or more shots later and it had jumped up to 7 point something.

    We carried on shooting and the power crept up to 10 point something at around 150 bar. It stayed at that level until about 100 bar when he chose to refill it.

    Now, for those members who have this model, is this in line with your experience?

    I appreciate that manufacturers have an incentive to claim a huge number of shots as it's a selling point, but this appears to be one of the wildest claims around. I mean, nobody really fills a S400 to 190 bar once they've tried it a few times, they stop at 175 or so.
     
    pbrown likes this.
  2. Jim Beam

    Jim Beam Engaging Member

    Messages:
    450
    Likes Received:
    180
    Location:
    Wigan
    Fill mine to 200 bar and shoot it down to 100 bar. Average 10.94 throughout, very happy with that, 70 plus shots in .22.
    I never fill to 220 bar, 1st 15 or so shots all over the place. As accurate as my other "big brand" pcp rifles.
     
  3. Meal Dot

    Meal Dot Engaging Member

    Messages:
    384
    Likes Received:
    458
    Location:
    South Wales
    Anything like a Coyote? If so then no, not my experience. I have plotted FPS from 210 bar down to 90 (both approximate). Starts at 773fps, stays around 755-773 for the next70 shots to about 150 bar with no noticeable curve to improve the fps. Then drops steadily over the next 70 shots as pressure drops from about 140 bar to about 90 bar with fps falling from 752 to 625. .177 HTH
    Cheers, Martin
     
  4. robs5230

    robs5230 леший

    Messages:
    10,801
    Likes Received:
    11,853
    Location:
    bideford devon
    I popped in whilst he was running that over the skan.
    As its similar to the Ultra / Scorpion (albeit a 1pc action and tube), I'd use similar fill pressure. Fill to 180 and shoot to 100 bar. The 232 bar fill is ridiculous.

    What pellets was he using Rich as that will also make a big difference ? If he was using German rather than Czech pellets, they'll sap power like you wouldn't imagine.

    If its .177 and he was using express or RS through those mags he's also onto a loser.
     
  5. charlie1969

    charlie1969 Engaging Member

    Messages:
    405
    Likes Received:
    491
    Location:
    nottinghamshire
    My phox which is almost same except the gx having a longer barrel shot best at 200 bar down to about 120ish giving about 45/50 shots cock on within my acceptable levels before accuracy dropped off,that was before the ratworks tune and huma reg.Others on here claim 70 odd shots within thier acceptable levels of accuracy so yours sounds a bit amiss.
     
  6. Nobby

    Nobby Posting Addict

    Messages:
    1,540
    Likes Received:
    1,250
    Location:
    Shebbear, North Devon
    I don't know what pellets he was using. On the basis of these comments I'm recommending he takes it back - politely - to the dealer and asks him to do his own test.
     
  7. charlie1969

    charlie1969 Engaging Member

    Messages:
    405
    Likes Received:
    491
    Location:
    nottinghamshire
    I've also tried lots of pellets through my phox,including jsb exact,rs and express,rws hobby,geco,superdome,r10,vmx,h&n plinking,econ,econ 2,various pro shot and bsa storm,elite,red star and fury.Although rather poor looking and my springers hate them both over the chrony and on paper my phox loves bsa storm,red star and elite just as much as jsb's.At less than half the price i have quite a stash of bsa ammo :thumb:
     
  8. Nobby

    Nobby Posting Addict

    Messages:
    1,540
    Likes Received:
    1,250
    Location:
    Shebbear, North Devon
    Latest news; the rifle went back to the dealer who immediately offered a cash refund (!) which wasn't what was wanted or asked for but shows me the calibre of the man, full marks to him.

    It went back to BSA, they have had it to bits and found the hammer latch pin was loose. It's had a flogging with a sharp stick and is allegedly running at 11.4; once it's proved to be stable it will be coming back via the dealer.
     
    charlie1969 and robs5230 like this.
  9. charlie1969

    charlie1969 Engaging Member

    Messages:
    405
    Likes Received:
    491
    Location:
    nottinghamshire
    Good service again from bsa,i read another post on here from someone having good service from bsa just a couple days ago.Glad to hear the rifle is getting sorted though,which is the main thing.
    Charlie
     
  10. Simon James

    Simon James Member

    Messages:
    11
    Likes Received:
    3
    This rifle was sent back to BSA andthe problem found by the gunsmith was - Loose Latch Pin. It is worth noting that the GAmo GX40 and the Phox have 13mm scope rails and the scope supplied with the Phox is 11mm, this will mean always adjusting for windage at ranges other than the zero range!
     
  11. robs5230

    robs5230 леший

    Messages:
    10,801
    Likes Received:
    11,853
    Location:
    bideford devon
    Hi Simon glad you got that sorted. I actually had the same on an Ultra a couple of years ago. Took some tracking down too.
    BKL mounts will cure the scope issue
     
  12. Simon James

    Simon James Member

    Messages:
    11
    Likes Received:
    3
    Thanks Rob. I did notice the scope problem when I purchased the rifle and got the dealer to change the mounts to 13mm!
     
  13. robs5230

    robs5230 леший

    Messages:
    10,801
    Likes Received:
    11,853
    Location:
    bideford devon
    Morning Simon
    Its the way BSA / Gamo cut their grooves in the breech.
    BSA have confirmed years ago the rail is 11mm.
    The issue is that on scope mounts with one sided clamps, the jaws of the mounts are just too thick / fat.
    BKL do fit perfectly central.
    13mm one sided mounts will fit but just won't enter the scope groove as fully as BKL.
     
  14. Simon James

    Simon James Member

    Messages:
    11
    Likes Received:
    3
    Ahh - now I understand, however the dealer did measure the rails and agreed with me!
     
    robs5230 likes this.

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