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Posted: 1/24/2017 8:33:24 AM EDT
[#1]
Throw a new Orion7 oprod spring in. Even if the problem turns out to be the brass.
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Posted: 1/24/2017 9:03:32 AM EDT
[#2]
Quote HistoryQuoted:
Something looks off. If the bbl nut is still holding the slip ring on, the bbl nut must've barely been screwed on. That's not the flaw of the aluminum or plastic - that's an assembly error. I'm betting the threads are not tall enough and stripped. |
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Posted: 1/24/2017 9:18:28 AM EDT
[#3]
Quote HistoryQuoted:
I have 5 AR's already. Quote HistoryQuoted:
Quoted:
Sorry to hear your CMP "Special" grade M1 isn't so special. Sounds like out-of-spec junk. 
Sell it at the next FunShow, and get an AR.  I have 5 AR's already. Was just yankin' your jimmies. 
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Posted: 1/24/2017 10:30:20 PM EDT
[#4]
Let's say this Greek brass works well this weekend. What's a good place to get some more? I have 4lbs of 4895 and what's left of 500 bullets. I would rather load them in Greek brass than the federal I currently have if it works well.
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Posted: 1/25/2017 12:28:36 AM EDT
[#5]
You got the rifle from the CMP, right?
Just get some more HXP off the e-store. $146/shipped for 200 rds in a 30 cal can. Shoot the ammo, keep the brass. |
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Posted: 1/26/2017 11:41:13 AM EDT
[#6]
Quote HistoryQuoted:
... I'm leaning towards a FL sizing issue. Me, too. I don't believe this is related to charge weights. They may be light but not so light as to prevent extraction. There was enough energy there to rip the rim off. I have used Federal brass in my reloads. It isn't just the brass. Undersized brass would wedge into chamber during cycling and be difficult to extract. Better check case length, too. Soft brass stretches more quickly than harder brass. Or both. |
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Posted: 1/26/2017 4:36:25 PM EDT
[#7]
I should have a case gauge waiting on me when I get home, will check all my cases and report back.
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Posted: 1/26/2017 5:21:08 PM EDT
[#8]
I know this won't be the cause, but I've read ideally, the first round out of the clip should feed from the left.
Danny 
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Posted: 1/26/2017 5:38:16 PM EDT
[#9]
Ok, got my Lyman case gauge. In the first pic you will see a case that easily fits into the gauge, in the second pic you will see the exact same case when I tried to chamber it by hand, that is as far as it will go.
 Attached File Attached File |
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Posted: 1/26/2017 5:49:47 PM EDT
[#10]
Case on the left, 2.472", goes into gauge fine, chambers in rifle fine
Case on right, 2.469", goes into gauge fine, will not chamber all the way (pictured in previous post)  Attached File |
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Posted: 1/26/2017 9:26:49 PM EDT
[#11]
Quote HistoryQuoted:
I know this won't be the cause, but I've read ideally, the first round out of the clip should feed from the left. Danny It's actually EASIER to load the rifle with the round on the right...and they come from the arsenal loaded this way. |
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Posted: 1/26/2017 9:28:34 PM EDT
[#12]
Quote HistoryQuoted:
Case on the left, 2.472", goes into gauge fine, chambers in rifle fine Case on right, 2.469", goes into gauge fine, will not chamber all the way (pictured in previous post) https://www.AR15.Com/media/mediaFiles/259822/image-134066.JPG Is your press/die set up to "cam over" when resizing? It's possible you are just a skosh from getting the case fully sized. Does a factory loaded round chamber fine? (remove the bolt if testing this at home) |
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Posted: 1/26/2017 9:36:28 PM EDT
[#13]
Quote HistoryQuoted:
Not true...the Garand will load the round from either side with no issues. It's actually EASIER to load the rifle with the round on the right...and they come from the arsenal loaded this way. Much easier to load with the top one on the right. |
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Posted: 1/26/2017 9:37:16 PM EDT
[#14]
Quote HistoryQuoted:
I'm looking at that bulge where the neck meets the should might be the problem. Is your press/die set up to "cam over" when resizing? It's possible you are just a skosh from getting the case fully sized. Does a factory loaded round chamber fine? (remove the bolt if testing this at home) Yea that was pointed out by someone else, lemme play with my sizing set up and see if anything changes. |
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Posted: 1/28/2017 4:25:44 PM EDT
[#15]
UPDATE:
Did some shooting today but not as much as I wanted to. Fired 2 clips of federal brass left over from last time, first went through without a hitch. Second clip had 2 lips ripped off, I did this as a baseline. I then fired 2 clips of Greek brass I loaded a few days ago before I had the suggestion of screwing in the sizing die a little more. These 2 clips also had a few lips ripped off. I then fired a clip of federal brass that was loaded after I screwed in the sizing die another 1/4 turn. This clip worked fine except the second round didn't feed/short stroke. These had 47gr of 4895 and were moving 2718 fps avg. ALL of the rounds fired today went into my case gauge perfectly. TLDR: I think it has a VERY tight chamber and is super picky about brass sizing. 47.5 grains of powder would appear to be what it needs to cycle properly, will test this out soon. |
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Posted: 1/28/2017 5:03:02 PM EDT
[#16]
Quote HistoryQuoted:
UPDATE: Did some shooting today but not as much as I wanted to. Fired 2 clips of federal brass left over from last time, first went through without a hitch. Second clip had 2 lips ripped off, I did this as a baseline. I then fired 2 clips of Greek brass I loaded a few days ago before I had the suggestion of screwing in the sizing die a little more. These 2 clips also had a few lips ripped off. I then fired a clip of federal brass that was loaded after I screwed in the sizing die another 1/4 turn. This clip worked fine except the second round didn't feed/short stroke. These had 47gr of 4895 and were moving 2718 fps avg. ALL of the rounds fired today went into my case gauge perfectly. TLDR: I think it has a VERY tight chamber and is super picky about brass sizing. 47.5 grains of powder would appear to be what it needs to cycle properly, will test this out soon. Call the CMP & send it back. They are quick on the turnaround & they will fix your Garand. It would help your case if you tested it with HXP or factory ammo. |
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Posted: 1/28/2017 5:13:38 PM EDT
[#17]
You say full-sized brass fits tight in the chamber, while new brass fits without a problem. You show full-sized second-hand brass doesn't fit without the op-rod slamming it and force-fitting it tight (which may explain your extractor ripping off rims).
Try a small base sizing die. If it's working with new brass that may fix your problem (especially if you're using brass first-fired from someone else's rifle). Use your micrometer and check the case dimension about a quarter-inch above the base of the case, then compare with the case drawing for new brass (about .2 inches from the base it should be around .4698"). If it's considerably bigger (and you have marks where a chambered but not fired full-size case shows heavy marks) it needs to be sized down more: 
A new or properly-sized cartridge should fit the chamber just being pushed in with a pinky, and should fall out when you point the muzzle straight up. |
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Posted: 3/20/2017 10:09:09 PM EDT
[#18]
What was the issue then?
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Posted: 3/21/2017 10:58:41 AM EDT
[#19]
Factory ammo for tests. If that works it's likely a reloading and sizing issue.
Factory ammo should slip in and out with no force needed. It could be an overly tight chamber. A couple turns of a pull through reamer by a smith would likely fix that issue. A reamer sent off for re sharpening could be the culprit. Might be at min specs. It would not surprise me with the size of their Operation that they have their reamers resharpened. Inversely you can make the ammo smaller with a small base sizing die. Assuming we have a sizing problem only. FWIW most of those drop in Gages only work on the shoulder to base length, the shoulder to mouth length. They tend to be loose in circumference dimensions so they wouldn't work on all sizing problems. |
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Posted: 3/22/2017 1:08:24 AM EDT
[#20]
I keep scratching my head on this, but I recall an issue I had on one of my garands. I had shot some older ammo in it that was likely corrosive. I cleaned my bore really well just in case but for one reason or another didn't clean the chamber well.
A few weeks later I was having a similar issue to you...ripped case rims and eventually got a piece of brass stuck that I had to knock out with a cleaning rod. The brass showed some odd marking. No clear scratches, but some odd indentations. I took a look in the chamber with a pen light and saw rust! I gave it a good scrub with a chamber brush and some hoppes #9. Problem solved! I doubt you have a rusty chamber, but have you cleaned it well with an M1 chamber brush? It is really difficult to correctly clean otherwise. I'm wondering if a tight chamber with some debris or thick preservative could be causing the problem. |
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Posted: 3/23/2017 8:43:02 AM EDT
[#21]
Quote HistoryQuoted:
Throw a new Orion7 oprod spring in. Even if the problem turns out to be the brass. I took it out for the first time this month. I used HXP ammo. I got consistent second round short stroking. Not cool. I put the original oprod spring back in and it ran like a champ. FWIW. |
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Posted: 3/23/2017 9:48:10 AM EDT
[#22]
The last time I was able to go shoot, which was a few weeks ago, everything fired well. I turned my sizing die in another quarter turn and I believe that may have fixed the issue. It still troubles me why everything was sliding in and out of my case gauge with no problem but then was ripping case lips off in the rifle. I am going to go shoot some more this weekend and will report back.
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Posted: 3/23/2017 10:01:10 AM EDT
[#23]
Did you size with a small base die?
Gas guns usually need it. |
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Posted: 3/23/2017 10:17:21 AM EDT
[#24]
Quote HistoryQuoted:
I suspect the OP wants an M1, not an AR. Quote HistoryQuoted:
<strong>Quoted:</strong>
Sorry to hear your CMP "Special" grade M1 isn't so special. Sounds like out-of-spec junk. <img src="http://www.ar15.com/images/smilies/icon_smile_approve.gif" /> Sell it at the next FunShow, and get an AR. <img src="http://www.ar15.com/images/smilies/smiley_smartass.gif" /> I suspect the OP wants an M1, not an AR. My first M1 Garand was not so hot. Getting an AR was a pretty good deal. I also bought a 700VS Sendero in .308. 30.06 milspec ammo was a lot harder to find before the internets. It really isn't such a bad suggestion. |
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Posted: 3/23/2017 10:20:21 AM EDT
[#25]
Quote HistoryQuoted:
Did you size with a small base die? Gas guns usually need it. 
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Posted: 3/23/2017 10:21:47 AM EDT
[#26]
Quote HistoryQuoted:
My first M1 Garand was not so hot. Getting an AR was a pretty good deal. I also bought a 700VS Sendero in .308. 30.06 milspec ammo was a lot harder to find before the internets. It really isn't such a bad suggestion.
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Posted: 3/23/2017 6:14:26 PM EDT
[#27]
Quote HistoryQuoted:
I have the lee ultimate die set, so whatever that is Quote HistoryQuoted:
Quoted:
Did you size with a small base die? Gas guns usually need it. When loading for autoloading rifles, you should always use a small base sizing die. Autos will have the exact issue you are experiencing if you use standard sizing dies on previously fired brass. If you use the small base die, your problems will go away 100% |
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Posted: 3/23/2017 8:08:56 PM EDT
[#28]
Quote HistoryQuoted:
Then this is your problem. When loading for autoloading rifles, you should always use a small base sizing die. Autos will have the exact issue you are experiencing if you use standard sizing dies on previously fired brass. If you use the small base die, your problems will go away 100% |
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Posted: 3/25/2017 10:46:51 AM EDT
[#29]
Quote HistoryQuoted:
Then this is your problem. When loading for autoloading rifles, you should always use a small base sizing die. Autos will have the exact issue you are experiencing if you use standard sizing dies on previously fired brass. If you use the small base die, your problems will go away 100% This is based on my limited reloading experience of 35,000+rds of 5.56, 9,000+rds of M2 ball, and 6,500+rds of M80 ball. But heck, what do I know? |
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Posted: 3/25/2017 10:25:44 PM EDT
[#30]
Small base dies were literally invented for this exact purpose.
They were designed for autoloaders that would get stuck cases exactly as the OP describes. But hey, every die manufacturer must have just been joking when the designed and produced them, since you know better. OP- a small base die or good factory ammo will fix most of your issues. Good luck. |
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Posted: 3/25/2017 11:36:31 PM EDT
[#31]
Quote HistoryQuoted:
Small base dies were literally invented for this exact purpose. They were designed for autoloaders that would get stuck cases exactly as the OP describes. But hey, every die manufacturer must have just been joking when the designed and produced them, since you know better. OP- a small base die or good factory ammo will fix most of your issues. Good luck. If his die is screwed in and the press has the correct "cam over" at the top of the stroke then the issue is with his chamber/barrel. the fact he is getting ripped off rims indicates one or two issues.. the chamber is improperly cut or the gas port in the barrel is too large causing the oprod to drive back with excess force. Because it came from CMP this he should contact them with a link to this thread and have CMP fix it... that is really the ONLY solution at this point IMHO. |
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Posted: 3/25/2017 11:45:37 PM EDT
[#32]
DoES the round fall into chamber easily? Do they fall out of chamber the same. Clean your chamber lately? When you say lubed it up you do mean grease right?
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Posted: 3/26/2017 12:08:35 AM EDT
[#33]
Quote HistoryQuoted:
If he is using brass that was fired in HIS chamber then he shouldn't need small base dies as the brass that was fired will be no bigger than his chamber. If his die is screwed in and the press has the correct "cam over" at the top of the stroke then the issue is with his chamber/barrel. the fact he is getting ripped off rims indicates one or two issues.. the chamber is improperly cut or the gas port in the barrel is too large causing the oprod to drive back with excess force. Because it came from CMP this he should contact them with a link to this thread and have CMP fix it... that is really the ONLY solution at this point IMHO. Quote HistoryQuoted:
Quoted:
Small base dies were literally invented for this exact purpose. They were designed for autoloaders that would get stuck cases exactly as the OP describes. But hey, every die manufacturer must have just been joking when the designed and produced them, since you know better. OP- a small base die or good factory ammo will fix most of your issues. Good luck. If his die is screwed in and the press has the correct "cam over" at the top of the stroke then the issue is with his chamber/barrel. the fact he is getting ripped off rims indicates one or two issues.. the chamber is improperly cut or the gas port in the barrel is too large causing the oprod to drive back with excess force. Because it came from CMP this he should contact them with a link to this thread and have CMP fix it... that is really the ONLY solution at this point IMHO. |
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Posted: 3/26/2017 12:18:36 AM EDT
[#34]
Quote HistoryQuoted:
It's once fired, not from his rifle...and by the pics, rounds are not chambering or extracting freely, stopping about 2/3 into the chamber. send the rifle BACK to CMP..let THEM figure it out...it THEIR responsibility. |
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Posted: 3/26/2017 12:36:55 AM EDT
[#35]
Quote HistoryQuoted:
Then this is your problem. When loading for autoloading rifles, you should always use a small base sizing die. Autos will have the exact issue you are experiencing if you use standard sizing dies on previously fired brass. If you use the small base die, your problems will go away 100% Quote HistoryQuoted:
Quoted:
Quoted:
Did you size with a small base die? Gas guns usually need it. When loading for autoloading rifles, you should always use a small base sizing die. Autos will have the exact issue you are experiencing if you use standard sizing dies on previously fired brass. If you use the small base die, your problems will go away 100% Small base dies help compensate for people who don't know how to set their dies up properly, or for chambers that are really tight bordering on out of spec for a semi-auto..... or people that want to buy machinegun fired ammo out of ridiculously oversized chambers, and then use it in a tight chambered semi. This is just wrong advice. |
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Posted: 3/26/2017 1:57:27 AM EDT
[#36]
Quote HistoryQuoted:
I have been loading for semi-auto in a bunch of different rifle calibers over the past 15 years, and I have never used or needed a small base die. Small base dies help compensate for people who don't know how to set their dies up properly, or for chambers that are really tight bordering on out of spec for a semi-auto..... or people that want to buy machinegun fired ammo out of ridiculously oversized chambers, and then use it in a tight chambered semi. This is just wrong advice. Quote HistoryQuoted:
Quoted:
Quoted:
Quoted:
Did you size with a small base die? Gas guns usually need it. When loading for autoloading rifles, you should always use a small base sizing die. Autos will have the exact issue you are experiencing if you use standard sizing dies on previously fired brass. If you use the small base die, your problems will go away 100% Small base dies help compensate for people who don't know how to set their dies up properly, or for chambers that are really tight bordering on out of spec for a semi-auto..... or people that want to buy machinegun fired ammo out of ridiculously oversized chambers, and then use it in a tight chambered semi. This is just wrong advice. OP bought once fired brass...source unknown. It's big. The Garand is forcing oversize brass into the chamber where it sticks. This is a simple issue...more sizing die. The correct tool is a small base die. With a larger chamber, likely any die would work. |
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Posted: 4/1/2017 7:31:39 PM EDT
[#37]
Alright, finally got an impromptu range trip in today, good news is no more case heads ripped off in the 4 clips I shot so that's fixed.
Bad news is twice I had a failure to strip a round out of the clip so basically the bolt closed on an empty chamber. I will attribute this to stiff recoil spring as the rifle only has MAYBE 150 rounds through it. Also twice I had the 7th round nose dive and shove the bullet back into the case, I've read about this issue before. |
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Posted: 4/1/2017 10:27:45 PM EDT
[#38]
Check it with a go gage.
CMP chambers waaaay too tight. Of CMP installed bbls I'm Three out of four that needed more reaming to get them to close on a go gage. I have no idea what in the H they are doing but my guess is they are using a Master Bolt to headspace and not the bolt that ends up with rifle.... If you don't have access to a GO gage , strip your bolt and using FACTORY ammo see if they chamber and bolt easily closes ( right lug bottomed out ). If not send it back to CMP and have them fix it. |
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