Air Head
Super member
There’s also a hole in the middle of the barrel !there's a hole for the pellet one end and the a hole the other for it to exit, why make it hard on yourself removing the barrel
lol
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the Daily hi thread
So who vandalised my rifle then? Is this what this sport has come too? 😡
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lol
ColinD
Super member
I rest my caseThere’s also a hole in the middle of the barrel !
lol
1260engineer
Member Extraordinaire
I did have a play and couldn't get anywhere near that look even allowing for shadows .
even 20mm down just a barrel . never mind a stripper too . the further down you go the less angle to get a lever point .
Air Head
Super member
Thanks, your practical trial echoes my line of thought on this.
I still think inherent flaw in material that may not have been visible at QC stage that has ultimately revealed itself following use.
Here is a (massively) more extreme example of such (for clarity something that wasn't obviously visible at QC):
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1260engineer
Member Extraordinaire
ChrisHobbs
Member Extraordinaire
Wasn’t that one down to them being supplied with seamed tubing rather than seamless?
So not really flawed material, but wrong product for the job.
Hmangphilly
Super member
New underwear Please .
Correct.
The point is the issue was not visible, until the moment it rather dramatically was.
I've edited the original to reflect that.
RDS1952
Super member
Wow, it is a bit of a Thread and a Half isn't it? I wasn't going to comment but I can't resist. As an engineer who has looked at many broken, damaged or otherwise "second hand" bits plus plenty that have manufacturing faults I can say with some confidence that, on the basis of the photos etc presented so far - I don't know whether it is sabotage or a manufacturing defect. I can say with some confidence that it isn't metal fatigue! What would be the possible mechanism for a fatigue failure?
From what can be seen from the photos it might be an inclusion in the steel, a bit of refactory material that got included in the melt and has made it all the way through to the bar material the barrel was machined from. IF that were to turn out to be true, it is something that could happen to Lothar Walter or anyone else! If we want our barrels made from vacuum remelted bearing steel we will have to pay for that! It might be a rifling problem but, if that were so, how come the rifling "downstream" of this nasty event is just the same as upstream? That's not to say it wasn't so - just that there are questions that would need resolving if that were the verdict.
Malicious damage - the suggestion that the crown would necessarily be damaged is not valid, nor does the presence of a stripper make it impossible to inflict damage like that - someone above suggested a tool with a retractable point that would "work" and I have just, for mischief's sake, drawn up a little one-piece tool that would do the job no trouble - no I won't share it just in case some sick b******ds might find they like it! Suffice to say that it is all a matter of leverage.
But all this (and the rest of the thread is conjecture until we have the evidence - direct photomicrographs of the damage from a sectioned barrel. Even this may not give us all the answers and it could still be a lab job if there is "stuff" inside the "holes" - so we can know what it is!
From what can be seen from the photos it might be an inclusion in the steel, a bit of refactory material that got included in the melt and has made it all the way through to the bar material the barrel was machined from. IF that were to turn out to be true, it is something that could happen to Lothar Walter or anyone else! If we want our barrels made from vacuum remelted bearing steel we will have to pay for that! It might be a rifling problem but, if that were so, how come the rifling "downstream" of this nasty event is just the same as upstream? That's not to say it wasn't so - just that there are questions that would need resolving if that were the verdict.
Malicious damage - the suggestion that the crown would necessarily be damaged is not valid, nor does the presence of a stripper make it impossible to inflict damage like that - someone above suggested a tool with a retractable point that would "work" and I have just, for mischief's sake, drawn up a little one-piece tool that would do the job no trouble - no I won't share it just in case some sick b******ds might find they like it! Suffice to say that it is all a matter of leverage.
But all this (and the rest of the thread is conjecture until we have the evidence - direct photomicrographs of the damage from a sectioned barrel. Even this may not give us all the answers and it could still be a lab job if there is "stuff" inside the "holes" - so we can know what it is!
Perhaps make it and test it on a barrel under the kind of conditions someone might be able to hastily commit an act of vandalism to see if it is feasible to create that damage.
Ian Cartmell
Member Extraordinaire
11 pages of totally getting no answers, it's glaringly obvious if you zoom right in what the cause was...
RDS1952
Super member
I am a design engineer at heart and rely on drawing and sums - a force of "x" here means "y" there, a space constraint looking like this (like a 4.5mm hole z mm long in this case) means I have this much room. If it's just simple physics there is no need for the development engineer (plus I don't have access to the kit to make even simple stuff these days). If the OP wanted to try it I'd send him a drawing!
Dale-some people may have had the rifle for an extended period of time to evaluate it-giving them ample time to cause malicious damage
Air stripper off, damage inflicted, air stripper on.
One would hope that such behaviour does not exist in our sport-lot of experiences, sadly show otherwise.
Perhaps offer the design to @1260engineer he is more than capable of building and testing it objectively.
It is perfectly possible to theorise what should happen if x and y are done, but practical testing proves or disproves the concept.
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Dale-some people may have had the rifle for an extended period of time to evaluate it-giving them ample time to cause malicious damage
Air stripper off, damage inflicted, air stripper on.
One would hope that such behaviour does not exist in our sport-lot of experiences, sadly show otherwise.
Whilst that may be the case, as it appears no-one has checked the rifle until recently it will ultimately be uncertain exactly what has happened.
As to who has had it for any period of time I imagine that there should be some trail of who it got farmed out to.
Tricky-Dicky
Member Extraordinaire
Well I can't see any sign of the image being photoshopped so my theory of a wind up seems out, what I can't get my head around is that it's not causing any accuracy issues but then Mr engineer doesn't seem to suffer with his slots, the other thing is that if it's been like this for some time it should have some build up of pellet residue which doesn't seem to show at all.
1260engineer
Member Extraordinaire
Air Head
Super member
RDS1952
Super member
If @1260engineer would like it, I will be happy to spend an hour or two working up a proper drawing but I suspect he has better things to do with his time! In any case, if @Tillygti6 sections the barrel, puts the offending area under a microscope and finds a lump of old clag or two in the steel it becomes a bit pointless... Hmm, is there a pun there?
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