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Posted: 8/8/2012 7:25:30 PM EDT
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So, I have a medium amount of experience with the M1/M14 platform, having built a couple from parts, and done some minor gunsmithing (like replacing a clip latch spring for ejecting clips) on a few more. I have most of the relevant tools (timing block, receiver wrench) and books, but I haven't done much with this platform in years, and only have one M1 at the moment.
And it has a problem: it is ejecting live rounds, specifically the 7th one, and either jamming, or throwing it completely free and closing on an empty chamber. I have changed the op rod spring, bullet guide, follower, and follower arm out. I put the rifle in a couple different stocks too. The rifle is fine on the timing gauge, and seems to do this with a variety of clips and ammunition. Ideas? Has anyone seen this? There's a couple mentions of this problem if you google "M1 ejecting live round" but no solutions. What should I change next? If it ejected the clip too, I'd know to look at the clip latch/ clip latch spring...and I'm probably going there next. I REALLY hate to have an M1 that won't work as well as, oh, a hi-point. |
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Over on milsurps they were talking about some kind of 7th round thing that can happen. Let me see if I can find it.
here you go I don't know if this really addresses your problem, but it's odd how it's the 7th round and this pertains to a malf on the 7th round. Is yours a winnie? |
| There were some early receivers that had a similar problem. Springfield figured out that a specific machining operation needed to be done to fix it. They did it to most of the weapons in that ser # range, but not all. Receivers that fall within that very short range and have not had that portion milled off are worth a little more to collectors. That's not saying yours is definitely within that range(and I can't remember what the range is off the top of my head), but it's worth looking in to. |
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I'm a way newer serial number than the original 7th round modification/rib issue, so I had discounted that, but I suppose I should look for wear in those areas.
Essentially, if you load a full clip, or three rounds into the gun, after firing what would be the 6th round, the 7th round is fed way high, so that the bullet tip either hits the top of the chamber causing a smokestack type FTF jam, or is actually thrown free of the gun, and the bolt closes on an empty chamber. I'd say that it only does it about 75% of the time at all, and of the times that it does it, it is about split 50/50 on whether the offending round is thrown free or jammed. This is pretty ammo independent, happening with a variety of CMP Greek HXP, Hornady's 168 M1 match load, and various handloads. |
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This may be a case of something that happens only once in a great while... Try posting the question on your rifle's malfunction to Gus Fisher at the other site. http://m14forum.com/gus-fisher/ |
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i don't know much about 7th round malfunctions but in my reading i did hear that in WWII they figured out that for whatever reason the problem was much less prominent when the clips were loaded one diretion than the other
i believe it happens much less when the clip is loaded with the round on the left on top. i know that won't fix the problem but it'd be interesting to see if that actually helps... |
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I do always load the top one on the right. Because I read this somewhere too. Plus it just feels better when loading. I know my brother in law would not care how you do it and whenever I loaded a clip that he had put together with one on the top left it just felt wrong to me. I'm a creature of habit though. And my Garand didn't seem to care. Hehehhe
But it would be worth a try, if the OP wasn't loading them on the right. Eh? |
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try chaning the op rod spring and the clip latch spring. may not solve the problem, but it is worth a try and it is easy and cheap. parts are here:
Orion 7 Fulton Armory go to the CMP website for how to do both: CMP M1 Assembly Info good luck |
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Quoted:
try chaning the op rod spring and the clip latch spring. may not solve the problem, but it is worth a try and it is easy and cheap. parts are here: Orion 7 Fulton Armory go to the CMP website for how to do both: CMP M1 Assembly Info good luck Yep, I would start with a Orion 7 spring kit and see if that takes care of it. Not very expensive, and a good rule of thumb for any Garand you plan on shooting much. |
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Quoted:
Quoted:
try chaning the op rod spring and the clip latch spring. may not solve the problem, but it is worth a try and it is easy and cheap. parts are here: Orion 7 Fulton Armory go to the CMP website for how to do both: CMP M1 Assembly Info good luck Yep, I would start with a Orion 7 spring kit and see if that takes care of it. Not very expensive, and a good rule of thumb for any Garand you plan on shooting much. The poster has already replaced the op rod spring, bullet guide, follower, and follower arm |
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Quoted:
Take the clip latch spring out and stretch it a bit, that may temporarily solve the problem. If the problem stops after doing this, the clip latch spring needs to be replaced. The enbloc is not ejecting with loaded rounds but individual rds are not loading Clip latch spring has nothing to do with this Its a timing issue somewhere |
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