Albroswift Posted July 11, 2018 Author Report Share Posted July 11, 2018 No problem on replacing the parts mentioned, doesn't sound like any big deal, and I'll get some more photos tonight. Really appreciate the help. PS As far as handloads, I have been handloading for about 100 years, 22 hornet to 45-70, and load 308 for 2 other rifles. I use a 2 die system to size to the guaged bore, press mounted trimmer/ trimmer die to length, hand chamfer, case guage, polish the brass before and after sizing lots of lube, hand chamfer and inspect every round, electronic powder dispenser, collet crimp die, etc etc so I will venture to say that my loads are tip top. :) Thought the extractor might not like the used rims so I did try factory and some brand new brass, same results. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 11, 2018 Author Report Share Posted July 11, 2018 Where do you guys like to shop for said parts? Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 11, 2018 Author Report Share Posted July 11, 2018 Wow everybody is out of stock! Quote Link to comment Share on other sites More sharing options...
DNP Posted July 11, 2018 Report Share Posted July 11, 2018 I'm guessing 98 bought them all. He's only had a dozen builds this month and that's his go-to setup. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 11, 2018 Author Report Share Posted July 11, 2018 Arghhh... Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 19 hours ago, 98Z5V said: gas tube, in the upper, with the BCG removed. I wanna see where it's at in the receiver, and how much it protrudes into the upper... Here it is Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 19 hours ago, 98Z5V said: gas tube, in the upper, with the BCG removed. I wanna see where it's at in the receiver, and how much it protrudes into the upper... Here it is Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 On 7/10/2018 at 9:05 AM, Matt.Cross said: That's physically unpossible my friend. You're saying that in the firing sequence, the bolt extracts the fired round(evidenced by the case mouth being dented by the locking lugs on your barrel extension), strips another cartridge from the mag, and then chambers the stripped cartridge with the spent cartridge trapped behind it. That's physically impossible. Based on the pics and the bent cartridge here is what I see happening when this occurs; the bolt fails to travel far enough rearward to properly strip the next cartridge, and begins to travel forward again before the extracted brass can clear the receiver. On the way forward, the bolt frictionally grabs the cartridge in the mag and pushes it into the barrel extension locking lugs where it bends and ceases to move, the bolt continues forward stovepiping the spent brass. That's my assessment. Not exactly Hello, Matt The spent cartridge ends up ON TOP of the live round, not behind it. If I put one round at a time in the mag the bolt locks back 100% of the time, even with my weakest load--150 gr @ 2275 fps. The photo is staged because I didn't think of taking the photo when it actually happened, but if you want to look at the photos I posted down towards page 2 the actual spent rounds they have a round mouth if that makes any difference. It is more like the round is bouncing out and then bouncing back in, if that is even possible, or releasing from the extractor too early and flipping sideways. Never had anything like this in my Colt SPII or my BAR 338. Thanks for the help! Quote Link to comment Share on other sites More sharing options...
DNP Posted July 12, 2018 Report Share Posted July 12, 2018 If your carrier is traveling all the way to the rear, but the spent casing is not being ejected....something is up with the ejector/extractor. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 7 minutes ago, DNP said: If your carrier is traveling all the way to the rear, but the spent casing is not being ejected....something is up with the ejector/extractor. That is what I thought, but I have never seen the spent round sticking out sideways like that on other rifles. Butt end of the spent round is all the way back against the left side of the upper. Quote Link to comment Share on other sites More sharing options...
DNP Posted July 12, 2018 Report Share Posted July 12, 2018 I'll let the experts say for sure, but if it's not spitting it out reliably, my guess is something is wrong with some of the minor parts. I'd try replacing those first...they're cheapest. If that ain't it, you're not out much. Quote Link to comment Share on other sites More sharing options...
DNP Posted July 12, 2018 Report Share Posted July 12, 2018 Could just be a piece of crud in it as its intermittent. You've ruled out ammo I think. It does the same thing with different brass. It's not grabbing something consistently or holding on too long. Quote Link to comment Share on other sites More sharing options...
DNP Posted July 12, 2018 Report Share Posted July 12, 2018 Not exactly the same, but I'd bet money his issue was pretty similar. Quote Link to comment Share on other sites More sharing options...
Robocop1051 Posted July 12, 2018 Report Share Posted July 12, 2018 i Agree with DNP. Open up that bolt and take a look. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 48 minutes ago, DNP said: I'll let the experts say for sure, but if it's not spitting it out reliably, my guess is something is wrong with some of the minor parts. I'd try replacing those first...they're cheapest. If that ain't it, you're not out much. Found a VLTOR tube and EA1095 spring at DSG, try that fist and let you know. Video similar, except 100% of my fails are case mouth straight out, butt tight to the left side of the receiver. Good video, shell bouncing around but not leaving the port. Wonder if my android phone would film that fast. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 2 minutes ago, Robocop1051 said: i Agree with DNP. Open up that bolt and take a look. Broke it down completely after several of the fails. New and clean looking. Heavy rubber doughnut around the extractor spring, don't remember my Colt AR 15 BCG having that. See how the new tube/ spring/ buffer work out. I'm obviously not an expert, but maybe the jar from a weak spring slamming to a stop could be the issue. Quote Link to comment Share on other sites More sharing options...
Matt.Cross Posted July 12, 2018 Report Share Posted July 12, 2018 1 hour ago, Albroswift said: The spent cartridge ends up ON TOP of the live round, not behind it. Gotcha. Here is what I was basing that on... On 7/10/2018 at 8:31 AM, Albroswift said: It is running back plenty far, it chambers the next round and then jambs the spent round on top of it. I think I understand your problem now... When the failure occurs, is the bolt behind the fresh round, or on top of it? Quote Link to comment Share on other sites More sharing options...
DNP Posted July 12, 2018 Report Share Posted July 12, 2018 (edited) I'm still going with ejector. You'll have a damn fine recoil system, but that ejector or the spring is jacked in some manner. Edited July 12, 2018 by DNP Quote Link to comment Share on other sites More sharing options...
98Z5V Posted July 12, 2018 Report Share Posted July 12, 2018 4 hours ago, Albroswift said: Here it is Need to see straight down into it, man - like this: Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 8 hours ago, Matt.Cross said: Gotcha. Here is what I was basing that on... I think I understand your problem now... When the failure occurs, is the bolt behind the fresh round, or on top of it? Hi, Matt Bolt face is behind the fresh round Thanks Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 6 hours ago, 98Z5V said: Need to see straight down into it, man - like this: OK, tonight! Thanks Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 7 minutes ago, Albroswift said: Hi, Matt Bolt face is behind the fresh round Thanks One time I dropped the mag, pulled the spent case, live round finished chambering. Most of the time however it is too deformed and if I let it try to chamber it gets moderately stuck, but, the extractor is engaged and will pull it back out. If I pull the bolt back first, then drop the mag, the live round is not extracted but will pull out with fingernail. Quote Link to comment Share on other sites More sharing options...
Matt.Cross Posted July 12, 2018 Report Share Posted July 12, 2018 3 hours ago, Albroswift said: One time I dropped the mag, pulled the spent case, live round finished chambering. Most of the time however it is too deformed and if I let it try to chamber it gets moderately stuck, but, the extractor is engaged and will pull it back out. If I pull the bolt back first, then drop the mag, the live round is not extracted but will pull out with fingernail. I'm pretty sure your recoil cycle is way too brief, needs to be a bit longer. That's a two-factor problem, the right gas system setup is the first component, and a heavier bolt carrier group is the second. I would address them in that order. Quote Link to comment Share on other sites More sharing options...
Albroswift Posted July 12, 2018 Author Report Share Posted July 12, 2018 3 hours ago, Matt.Cross said: I'm pretty sure your recoil cycle is way too brief, needs to be a bit longer. That's a two-factor problem, the right gas system setup is the first component, and a heavier bolt carrier group is the second. I would address them in that order. Thanks Matt, that's where most of this information seems to be pointing and it makes sense. I have the longer tube and spring on order so that should give me some more direction. When you say a heavier bolt carrier group, could/would you include the buffer weight in that calculation? PS great forum, I don't think I have ever received this much help on the interweb EVER! Quote Link to comment Share on other sites More sharing options...
Matt.Cross Posted July 12, 2018 Report Share Posted July 12, 2018 25 minutes ago, Albroswift said: When you say a heavier bolt carrier group, could/would you include the buffer weight in that calculation? Definitely. Heavier buffer = more cycle time. Quote Link to comment Share on other sites More sharing options...
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