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Posted: 3/11/2015 1:32:49 PM EDT
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I got out to the range yesterday to shoot my newest build. I ran into issues with it loading the first round out of a magazine. I tried multiple magazines with no change. The BCG wouldn't go into full battery, and even if I pushed the charging handle forward and got it to go full battery it would jam up on the second round. I tried magazines with 28-30 rounds, no change. Different ammo, no change.
When I got home I tried running a snapcap through it and it goes full battery with the snapcap (in a full mag) just fine. It's got a rifle length buffer, A2 receiver extension and a PRS Stock, PSA premium BCG, Raptor Charging handle, the upper is a PSA premium. Any ideas as to what could be causing this? I didn't have a chance to test this with a different BCG, but will try that tomorrow morning. |
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I can't tell from the info given, but I can tell you this; when a gun is telling you that there's a problem, you would be wise to stop trying to make it fire until you know whats wrong. That's exactly why I stopped shooting it yesterday. Shot all of 5 rounds through it is all. |
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Quoted:
That's exactly why I stopped shooting it yesterday. Shot all of 5 rounds through it is all. Quoted:
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I can't tell from the info given, but I can tell you this; when a gun is telling you that there's a problem, you would be wise to stop trying to make it fire until you know whats wrong. That's exactly why I stopped shooting it yesterday. Shot all of 5 rounds through it is all. Shouldn't have shot one. Drop an empty case (preferably steel if you have one lying around) in the chamber, will the bolt close on it? First thing that comes to mind would be an improperly cut or rough chamber and/or throat. |
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Shouldn't have shot one. Drop an empty case (preferably steel if you have one lying around) in the chamber, will the bolt close on it? First thing that comes to mind would be an improperly cut or rough chamber and/or throat. Quoted:
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I can't tell from the info given, but I can tell you this; when a gun is telling you that there's a problem, you would be wise to stop trying to make it fire until you know whats wrong. That's exactly why I stopped shooting it yesterday. Shot all of 5 rounds through it is all. Shouldn't have shot one. Drop an empty case (preferably steel if you have one lying around) in the chamber, will the bolt close on it? First thing that comes to mind would be an improperly cut or rough chamber and/or throat. No empty steel but I just dropped an empty brass casing in the chamber. Bolt does not close all the way. ETA: And now the case is stuck. CH won't budge. Tried pulling the CH and smacking the buttstock on the ground with no luck. Can't separate the upper and lower cause the BCG is in the buffer tube a half inch. Pulled the stock and buffer tube off to try and push the BCG forward and it still won't budge. Ideas? I'm beyond confused as to how the hell I managed to get the BCG this stuck. |
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Ideas? You have either a chamber or bolt problem, most likely a miscut chamber. You need to "mortar" the rifle to eject the case. Should not have let the bolt go forward with enough force to get it stuck that tight to begin with. If you have a collapsible stock, collapse it fully before mortaring. If you have the upper separated from the lower, and you have an M16 type carrier you can whack the sear trip area of the bolt carrier, using a tool like a screwdriver at a right angle to the bolt carrier and then ding it with a hammer. |
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You have either a chamber or bolt problem, most likely a miscut chamber. You need to "mortar" the rifle to eject the case. Should not have let the bolt go forward with enough force to get it stuck that tight to begin with. If you have a collapsible stock, collapse it fully before mortaring. If you have the upper separated from the lower, and you have an M16 type carrier you can whack the sear trip area of the bolt carrier, using a tool like a screwdriver at a right angle to the bolt carrier and then ding it with a hammer. Quoted:
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Ideas? You have either a chamber or bolt problem, most likely a miscut chamber. You need to "mortar" the rifle to eject the case. Should not have let the bolt go forward with enough force to get it stuck that tight to begin with. If you have a collapsible stock, collapse it fully before mortaring. If you have the upper separated from the lower, and you have an M16 type carrier you can whack the sear trip area of the bolt carrier, using a tool like a screwdriver at a right angle to the bolt carrier and then ding it with a hammer. I tried mortaring first thing and had no luck what so ever. I've tried removing the upper from the lower, but the BCG is in the buffer tube. I removed the stock, buffer, spring and tube thinking I could push the BCG forward enough to separate the upper and lower with no such luck. What would be my best method of remove the BCG now? Also your avatar is how I feel right now. ETA: Cleaning rod did the trick. You think scrub the chamber good and see how it feeds then? |
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You think scrub the chamber good and see how it feeds then? I would visually inspect the chamber to see if you can find the reason why the round is not going in. If you had a stuck casing, you might be able to see a rough mark or burr somewhere. Was this a build where you put the upper/barrel together or did it come pre-assembled? Have you run a go-nogo gauge on it yet? if the gauge test passes, then I would chuck the chamber brush on a drill and give the chamber a few passes. |
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If it was that bad I don't think scrubbing the chamber is going to fix the problem. It needs to go back to the manufacturer IMO. Quoted:
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You think scrub the chamber good and see how it feeds then? If it was that bad I don't think scrubbing the chamber is going to fix the problem. It needs to go back to the manufacturer IMO. I took a chamber brush to it to see if that helped. Gave it a good scrub down and lubed up the BCG and tried again. Chambered fine with multiple magazines so I took it out shooting. I think it may have been a combo of the rough chamber, and a semi-dry BCG. |
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I would visually inspect the chamber to see if you can find the reason why the round is not going in. If you had a stuck casing, you might be able to see a rough mark or burr somewhere. Was this a build where you put the upper/barrel together or did it come pre-assembled? Have you run a go-nogo gauge on it yet? if the gauge test passes, then I would chuck the chamber brush on a drill and give the chamber a few passes. Quoted:
You think scrub the chamber good and see how it feeds then? I would visually inspect the chamber to see if you can find the reason why the round is not going in. If you had a stuck casing, you might be able to see a rough mark or burr somewhere. Was this a build where you put the upper/barrel together or did it come pre-assembled? Have you run a go-nogo gauge on it yet? if the gauge test passes, then I would chuck the chamber brush on a drill and give the chamber a few passes. Upper came preassembled. Go-nogo gauge was fine, so I went at it with the chamber brush. Seemed to help a ton. Thanks guys! |
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Upper came preassembled. Go-nogo gauge was fine, so I went at it with the chamber brush. Seemed to help a ton. Thanks guys! Quoted:
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You think scrub the chamber good and see how it feeds then? I would visually inspect the chamber to see if you can find the reason why the round is not going in. If you had a stuck casing, you might be able to see a rough mark or burr somewhere. Was this a build where you put the upper/barrel together or did it come pre-assembled? Have you run a go-nogo gauge on it yet? if the gauge test passes, then I would chuck the chamber brush on a drill and give the chamber a few passes. Upper came preassembled. Go-nogo gauge was fine, so I went at it with the chamber brush. Seemed to help a ton. Thanks guys! Just curious... Did you clean the upper when you first got it, or did you try shooting it right out of the box? |
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Just curious... Did you clean the upper when you first got it, or did you try shooting it right out of the box? Quoted:
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You think scrub the chamber good and see how it feeds then? I would visually inspect the chamber to see if you can find the reason why the round is not going in. If you had a stuck casing, you might be able to see a rough mark or burr somewhere. Was this a build where you put the upper/barrel together or did it come pre-assembled? Have you run a go-nogo gauge on it yet? if the gauge test passes, then I would chuck the chamber brush on a drill and give the chamber a few passes. Upper came preassembled. Go-nogo gauge was fine, so I went at it with the chamber brush. Seemed to help a ton. Thanks guys! Just curious... Did you clean the upper when you first got it, or did you try shooting it right out of the box? I gave it a very quick once over. Not enough obviously, next time I'll be sure to give any new uppers a good cleaning. |
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Snap caps usually have shorter OAL (snub nose) and thin rims. If your throat/chamber is out of spec I could see how it could still chamber a snap cap. As soon as I saw that you tried to chamber a spent casing I knew immediately what was coming next. They can get stuck if they aren't trimmed/squeezed back into shape. -Stooxie |
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Where did you get the brass casing that you tried to chamber?
The casing expands when the round is fired, and casings fired in one gun may jam if tried in a different gun since the chambers of all guns are not identical. Some are bigger than others. Brass casing will always fit back into the gun that they were fired in (without resizing or being reloaded). Brass casings fired in another gun may chamber, but they almost may seize or get stuck. This is the same reason that improperly reloaded rounds may fit in one gun and may or not not in a different gun. |
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