montanamac

Troll your post??? Gee I'm sorry for having an opinion that you don't agree with. Good luck, I'm sure you're smart enough to figure out your own problem.

I'm a lefty and I use a standard upper but I added an ambidextrous charging handle, they can be found by just searching for - AR 10 ambi charging handle.

After retiring from the military I moved the family to Kansas so that my wife could be close to her family. After a few moves and a couple of years I told the wife that I just couldn't live there anymore, I missed the mountains and the open country of the west where I grew up. While we lived in Wichita I tried to join a rifle club but it was a joke. 50 yards for rifle but they were real proud of their long range target - it was one shooting position with a target frame at 100 yards. Hunting sucked since I could only really hunt if I joined a hunting club or knew a farmer and even then they usually hunted in drives across open fields for deer - boring. I grew up in Arizona and never knew how difficult it is east of the Mississippi for rifle shooters. I can't believe that anybody would even imagine that 50 yards is a reasonable distance for shooting rifles, hell, I shoot my pistols that far, even the .22LR is used at 100 yards. Now that I've settled in Montana I have my own mini-range out to 200 yards, there's a 400 yard range only 20 minutes drive from my house and if I want to shoot farther than that I just need to drive out to public land and pick a spot without too many trees or mountains. Good luck guys but then I'll be honest, if it were really important to you you'd either change the laws or leave the state, but then I'm pretty happy when you choose to stay where you are. Way too often we get somebody from out of state that claims to love everything Montana but the first thing they want to do is change everything, so I figure that the less we get to move here the better. Hell, even I'm considered an outsider and I've been in my remote cabin for almost 6 years now. It's only been the last year that some of the people that live closest to me have started talking with me - and I like that way.

Hmm, you mean the ejector or something associated with it might have caused your ejection problem? Wow, who would have thought - 😏

What powder are you using?

So like magic the AR 10 will run well without excessive lubrication AFTER you've shot it a lot. Exactly what kind of round count do you consider "broken in"? If a machine of any kind wont work well unless you lubricate it then the parts aren't fit together correctly. Lubrication is designed to REDUCE wear on parts. Braking in a rifle typically is a process of wearing parts in such a way as to make them fit together better. So according to your logic, lubricate the rifle so that the parts don't wear and then it will work better after the parts have worn to some degree. If braking in is simply wearing the parts to some degree and lubrication reduces wear, then doesn't it make sense that if you shoot it without lubrication it would brake in quicker? If you have to brake in the rifle with lubrication until it wears the parts to some degree, wouldn't that imply that the parts simply aren't sized correctly to begin with? All I know is that I haven't lubricated my new Springfield Victor .308 since I bought it and I've had no malfunctions at all and I've put 450 rounds through it so far, I guess mine broke in with the first round.

Personally I don't agree that running too dry is a problem, I did it all the time in the military, it was far better than worrying about sand jamming the action. Ejection is ejection, the mechanical action of ejecting is pretty simple and directly involves the ejector and spring. Having lost the old one means you'll never know if it was a problem but if installing a new one seems to fix the issue then it's a pretty good bet that it was the problem. But I do agree that timing is critical in any gas operated rifle and there could be a problem with how much gas there is, the magazine or mag follower spring, or the recoil parts. Any of those could change the timing of the BCG and how it interacts with the ammo. For all I know it could be the extractor, maybe it's too short and the case is slipping out from under it while it's being pushed out by the ejector. That would be hard to detect when hand operating the rifle but with the high momentum and speed of normal operation it could occur.

Hasn't anybody else noticed this picture from the OP's original post? A case that hasn't ejected jammed with a cartridge that has been partially chambered. That seems to me to me an issue with ejection, not gassing or lubrication. It looks like the rifle went through the extraction properly but didn't eject the case at all. The bolt carrier went far enough back to strip a new cartridge off of the magazine and pushed the new cartridge forward in to the chamber until the bolt was stopped by both the old fired case that had not been ejected and the new fresh cartridge.