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

Question Ultra - Techy Questions

Discussion in 'Anything Airgun Related' started by mitov08, Nov 7, 2018.

Tags:
  1. mitov08

    mitov08 Well-Known Member

    Messages:
    71
    Likes Received:
    21
    Location:
    Birmingham
    Hello All,

    Managed to finally properly fix my bolt from locking into place. Seems like the spring was too tight and jamming the ball in the bolt rather than allowing it to snap out of place. The way I fixed it was cut the spring in half and stretch it a bit now its functioning comfortably.

    However I have a few questions that I cant figure out the answer to them and hoping the community may know!

    1. I am assuming that the majority of air rifles with a bolt system have a similar locking system, where when you cock the bolt into the firing position a spring pushes a steel ball into a groove slot for it. Any reason why the ball can jam the bolt to such an extend where the handle loosens up in the process of cocking?

    2. This issue appeared one day on the shooting range, fixed it temporary before it occurred again. However during that shooting session something EXTREMELY weird happened that I cannot process and would love to hear your guys thoughts on: I fired my standard pellet that provided a superb grouping (Kaisers 8.64g, or also known as H&M Field Targets). However the grouping was all over the place! Every shot was unpredictable and going all over the place.... This is now where it gets really odd, took off my weihrauch silencer the grouping was spot on...

    I had a look inside the silencer and it does not appear that the pellets are clipping it. I am suspecting that maybe its due to the fact I increased the FT.lb pressure from 9 to 11.5?

    Any thoughts will be greatly appreciated! Barrel has been cleaned about 1 month ago.

    Tempted to try JSB heavies based on the pellet recommendations I received for the Ultra to see if that revives my baby...
     
  2. terry1001

    terry1001 Major Poster

    Messages:
    8,419
    Likes Received:
    1,182
    Location:
    Ipswich
    It would help if you could say which rifle it is that's giving problems.
     
  3. Roger Archbold

    Roger Archbold Engaging Member

    Messages:
    277
    Likes Received:
    147
    Location:
    Hampton, middlesex
  4. mitov08

    mitov08 Well-Known Member

    Messages:
    71
    Likes Received:
    21
    Location:
    Birmingham
    Apologies, thought the Ultra was more than enough information my bad.

    The gun is: BSA Ultra SE (Multishot)
     
  5. robs5230

    robs5230 леший

    Messages:
    9,513
    Likes Received:
    9,710
    Location:
    bideford devon
    I'd suggest if the bolt seems to be seizing, the ball and spring detent may not be the only issue.
    The probes have been known to shed their chrome plating which could possibly allow bare areas to develop rust but I'd still want to rule other areas out.
    I think it was mentioned on one of your other posts by someone that the banjo fitting may have come loose.
    I my self have experienced the bolt actuating rod / bar coming loose so it may be a case of a good stripdown and reassembling everything correctly
     
    SteveO likes this.
  6. SteveO

    SteveO Squinty

    Messages:
    10,213
    Likes Received:
    8,653
    Location:
    Planet Earth
    The ball detent is only there to hold the bolt down in the firing position so the banjo stays in its slot in the top alloy housing, it doesn't do any more than keep the handle down under tension.

    I would surmise possibly that the pressure of the spring was putting lateral pressure on the pellet probe and perhaps it was causing the pellet probe seal to leak, therefore causing wild variations in power and the shots to be all over the place, however saying that, I didn't think the spring was that strong from experience, was it a new gun? if not perhaps it's been tampered with as I can't come up with an even semi-logical explanation for that spring to become damaged unless it's been done my a messer!

    Below - bolt closed, handle down, bearing detent in place. DSC00067.JPG

    Below - bolt open, handle up, bearing detent not in place.
    DSC00066.JPG
    DSC00075.JPG
     
    Blackmax and robs5230 like this.
  7. SteveO

    SteveO Squinty

    Messages:
    10,213
    Likes Received:
    8,653
    Location:
    Planet Earth
    Ps. What silencer is it and did you strip it down and check the baffle washers? you will see they are dented if it's clipping, I'd say it's a certainty if it shoots straight without if fitted.
     
    Blackmax and robs5230 like this.
  8. mitov08

    mitov08 Well-Known Member

    Messages:
    71
    Likes Received:
    21
    Location:
    Birmingham
    That Banjo thing you showed (white thing that hugs the bolt) is that supposed to be standard supplied with the Ultra as my one did not have one...

    Have not opened the silencer, might give it a go. Regarding the washer, my terminology may be slightly off. But I am assuming you are talking about that washer that sits between the buddy tank and rifle barrel. Had a look at it seems perfectly fine. No wear or tear can be seen.
     
  9. mitov08

    mitov08 Well-Known Member

    Messages:
    71
    Likes Received:
    21
    Location:
    Birmingham
    P.S = Realised the banjo is the thing that actually keeps the bolt in lock. What is that white thing as mine isnt there lol
     
  10. SteveO

    SteveO Squinty

    Messages:
    10,213
    Likes Received:
    8,653
    Location:
    Planet Earth
    Don't worry about that, you won't have that mod unless you have a Bowkett blueprinted gun, it's a probe bearing.

    There are a series of sound dampening chambers (usually) in a mod that are seperated by washers that have a 6mm hole in them, could be 3,4 or more, if the mod is not inline with the barrel the pellets will clip and bend the hole out of shape, they get worse the more they get bent.

    Remove them and hammer them flat ensuring you don't squash / distort the hole any smaller, note some mods have deliberately bent washers - the hole looks stretched, they're done on a press, exactly why I don't know!
     
    Last edited: Nov 7, 2018
    Blackmax and mitov08 like this.
  11. mitov08

    mitov08 Well-Known Member

    Messages:
    71
    Likes Received:
    21
    Location:
    Birmingham
    SteveO may I trouble you with potentially a skype call? the Bolt is still acting up I am very clueless and would really benefit from some guidance
     
  12. SteveO

    SteveO Squinty

    Messages:
    10,213
    Likes Received:
    8,653
    Location:
    Planet Earth
    I don't use skype mate I'm afraid, You can PM me or I'll PM you my number tomorrow, I'll help if I can. :up:

    Just settling down to watch some FLASH with the family!
     
  13. mitov08

    mitov08 Well-Known Member

    Messages:
    71
    Likes Received:
    21
    Location:
    Birmingham
    I think I may have sorted it, shortened the spring so it does not stick out when in the cocked position. For some safety measures I added a bit of grease to the ball and spring :D

    Will test it once more when I get home and report if it's back to its old ways.
     
    SteveO likes this.
  14. Blackmax

    Blackmax Forum Rude Guy

    Messages:
    6,390
    Likes Received:
    5,031
    Location:
    Rayleigh
    Very useful information Steve, you thought about doing a strip down guide for the stickies? I've worked on a few of that design and they certainly can be fiddly so it would be handy for people wanting to fix their own guns.
     
    SteveO 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