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Originally Posted by
303Guy
I've noticed this bolt jump on dry firing, now that I'm reminded
And there's the likely culprit. If the bolt handle touches the socket whilst cocked and the bolt has lots of vertical play, then it's not hard to see how the "unwinding" of the bolt occurs. Pressure from the sear will keep the bolt in it's most upward position until the striker is released. As the pressure is relieved, the bolt moves downward and the hanle, having nowhere else to go, starts rotating. Rearward thust from the cartridge will keep things energetic!
BTW, I assume the 0.015" gap you mentioned is with the striker down and with nothing in the chamber. Since there's no real forward postioning control, the bolt often will move forward until the extractor hits the breech cutout or the LH lug contacts something. Otherwise you might get upwards of 0.060" free motion!
ETA: This reminds me of a thread from 2009-2010, maybe. But I'm thinking that there may be a cure for the vertical slop in the raceway. Need to round up some scrap actions at the shop and do scary things...
Last edited by jmoore; 09-17-2013 at 02:32 AM.
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09-17-2013 12:48 AM
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Gentleman, I've followed this thread and I'm convinced that nothing is happening to this rifle that can not be solved by the use of duct tape and some superglue...
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I know warpig was a bit tongue in cheek but the fact remains that you could not manually lift the bolt fast enough to cause a dangerous situation. End of problem!
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Don't you think that would be a bit tacky? i mean, with the tape residue and all.
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... but the fact remains that you could not manually lift the bolt fast enough to cause a dangerous situation. End of problem!
Thank's Peter. That's enough for me. I just happen to be watching an episode of Myth Busters (the worlds best job) and they were playing around with - wait for it - the Newtons Cradle. Bingo. As has been said all along, that's what's happening. (The Myth Busters team were playing around with a somewhat larger than the desktop model!) However, the bolt is completely unlocking in this instance, right?
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Newtons cradle is the transferrence of energy right enough. But whether this is anything to do with the other part of this bolt fully opening saga or not is another matter altogether. On closer investigation of this fairy tale, there were a couple of different versions of this 'bolt fully opening' rubbish that didn't ring true or even make mechanical sense. I don't think anyone really got to the bottom of it. Mind you, after a few red herrings, a couple of forthright opinions were soon deemed necessary
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Newtons cradle is the transferrence of energy right enough. But whether this is anything to do with the other part of this bolt fully opening saga or not is another matter altogether. On closer investigation of this fairy tale, there were a couple of different versions of this 'bolt fully opening' rubbish that didn't ring true or even make mechanical sense. I don't think anyone really got to the bottom of it. Mind you, after a few red herrings, a couple of forthright opinions were soon deemed necessary
If the bolt handle going horizontal during the firing of the weapon is the "red herring" you are referring to, I can assure you it did indeed happen! I had some neck surgery about 18 months ago and was not of the mindset to fire anything more than a rimfire rifle until I saw how much recoil and shoving around the Lee-Enfield did on my friend who is about the same size as me. Since the Drs. took out part of a verteba and two discs, replaced them with titainium parts and screws (sort of a new head gasket for you car buffs), I really wanted to gain some confidence in this 60+ year old body that has gone through several rebuilds in years past. Scott fired the rifle the first time and his comment was, I didn't know the Enfield was a straight pull bolt action like the Steyr. I informed him it isn't supposed to be. He fired another shot and the bolt handle popped up to horizontal again. That is when I asked him to stop until I find out what is right or wrong with said rifle. Quite frankly, I am somewhat mechanically minded and although the terminology difference between the continents is a wee bit confusing, I think I am catching on. Scott and I usually meet for breakfast on Thursdays and if weather permits I will bring the Enfield along and see if we can get my old Nikon DSLR to take some photos. I don't know if this camera has a movie mode or not, but, if it does, I have never used it. If it does i will try to get some moving pictures for all to see. Additionally, I will take some still photos of the rifle and the associated componts to show what I have been trying to convey as far as wear on locking lugs, groove in stock socket, etc.
The fact that with the bolt out of the gun I can easily cock and uncock the bolt with little force makes me think that perhaps this is the trouble. When my bolt disassembly tool shows up I will be able to see if the main spring is weak or perhaps even the spring is broken and short, thus allowing the easy cocking and uncocking.
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You don't need a bolt stripping tool to test the striker spring. IN fact, it must be IN the bolt to test it....... The fired position should require a 7 - 9 lb load to move the cocking piece rearwards and in the cocked position, it should require a 13 - 16 lb load.
Forgot to say........ But as I do say occasionally, in my limited experience in these things, if a striker spring weighs in at much less than the minimum 7lbs weight, then it won't fire the round (Mk7 UK
ball I'm talking about here...)
Last edited by Peter Laidler; 09-18-2013 at 02:54 PM.
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You don't need a bolt stripping tool to test the striker spring. IN fact, it must be IN the bolt to test it....... The fired position should require a 7 - 9 lb load to move the cocking piece rearwards and in the cocked position, it should require a 13 - 16 lb load.
Forgot to say........ But as I do say occasionally, in my limited experience in these things, if a striker spring weighs in at much less than the minimum 7lbs weight, then it won't fire the round (Mk7
UK ball I'm talking about here...)
Attachment 45972
Son (some time ago) did a series of photo's showing the uses of the Trigger Tester, maybe he can repost.
Mine are not the best, but they are not too bad. I can think of lots of Enfields I'd rather have but instead of constantly striving for more, sometimes it's good to be satisfied with what one has...
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You don't need a bolt stripping tool to test the striker spring. IN fact, it must be IN the bolt to test it....... The fired position should require a 7 - 9 lb load to move the cocking piece rearwards and in the cocked position, it should require a 13 - 16 lb load.
Forgot to say........ But as I do say occasionally, in my limited experience in these things, if a striker spring weighs in at much less than the minimum 7lbs weight, then it won't fire the round (Mk7
UK ball I'm talking about here...)
This is good information to know. I don't have a scale in that range. I will make a fishing line sling then attach the sling to the cocking piece and start placing some weight into the sling and see where it cocks at.
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