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Posted: 3/7/2007 5:50:37 PM EDT
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I have a ciener conversion in my AR. It has always run flawlessly with 99.9% federal bulk ammo in the "milk carton". **1st point....since it has run great I have never even looked at extracted spent cases other than to clean them up. Move up to a month ago.... Walmart (the supreme cheap plinker ammo supplier) had only one box of federals so I bought 2 boxes of winchester experts. This is not a debate on how bad this ammo sucks.....and it does (FTF,FTE,AND MORE) but about do I have a problem. (this ammo sucks in all of my guns for one reason or other) Move up to last friday.... Shooting the AR, lots of federal but trying to burn up the exprts just to spite them since I hate them. (yup,cheap basid here and I hated to throw them away even if I know it was going to be jam city) Anyway, after a good amount of rounds.......KB!! Nothing hurt but a KB none the less. Blew the case out by the head and double belted the rim. After a BUNCH of looking I guessed that my "shell deflector" (rag) had gotten in the bolt and cased the problem by a small fraction......compounding to a bigger problem=KB. Everything looked fine in the gun and mag so after inspection and cleaning I shot the federals (only) and had a great time. (about 500rnds that night and I would like to again promote the virtues of eye and ear protection) I have shot it twice more for a total of 200 more rounds of federal and all was great. I was NOT going to shoot any more experts in that gun and just save them for the revolver that was the only gun that would shoot them without a jam BUT it hated them for any inkling of so called accuracy. Fast forward up to tonight.......... Went shooting tonight.320 rounds(about) on a mag count. There were a couple short mags, but thats not the point. I found 12/13 experts mixed in the the federal and thought WTH I'd load them and deal with them when they jammed since there was so few and the last incident was just a fluke. Well...........about almost half way into the shoot...........KB again. Guess what? It was another winchester. Again nothing hurt.....inspect everything........clean everything.......shoot more federals and only federals and no more problems. BUT At this point I look at the spent cases. There is "bulging" on all the cases from the ejection side. On the federals it's very minimal but I can see it. The winnys were, lets say pronounced! So I'm going to have to say the winchester cases are a good bit thinner than the federals. It looks as when it fires it is ejecting too soon so to speak. I know it could happen but I haven't heard of headspace problems on the 22lr rimfires. It could have been this way all along and I never noticed it due to the federals containing and covering a problem. But do I have a problem. Thats my real question. I know a lot of you shoot different ammo and a bunch shoot federal "milk cartons". Do you look at the cases and have you seen any bulging at all? What I can see to repeat myself is that while I can see "something" the federal don't scare me at all. But if no one else has no indication on theirs and looks like it was fired from a bolt gun I need to figure out whats wrong with mine. Thanks for all opinions and to anyone who'll take a peek at their spent cases. |
Thanks for the helpful comments to my problem. No hard feelings if you fix my post so anyone with any edumaKaction can read it. Terrible writer, well yes I am. Never claimed to be any different. Just a guy with a question. (and I couldn't find my crayons )At least cut me a little slack. I didn't do it in all caps. 
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| In my experience, a great many KBs and fail to fires in AR conversions are caused by dirty chambers not allowing the rounds to fully chamber. The first click you get is the warning sign that you need to hit the chamber with a GI .223 bore brush. I've had about zero problems since I started doing this. |
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Look at the bulg in refrence to location of the firing pen strike. It should be firing pen strike at 12:00 bulg at 6:00. If so, mine does this as well with hot ammo. It is due to the unsuported chamber at the feed ramp. Kinda like Glock I have had no KB's so yours may be defectively over cut. Or you may have done some polishing to the ramp that took away too much of the chamber? Either way let us know. |
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I have tried a ton of different 22s in my Ciener and Remingtons always have an issue. I have had zero issues with Federal bulk 22s for just fun plinking. My Remingtons were actually bowing as they were being stripped from the mag and getting caught on the feedramp. I took a look at a few of them that I manually ejected and they were toatally bent. Needless to say I do not put any other bulk packs through my AR except for Federal. |
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Thanks for the input guys. I have never had the first problem out of the federal ever. My ciener is stock, bone stock. It has never eaten anything but federals until this. So I'll guess it's ammo since I still don't have a problem with them. Like I said nothing I own likes the winchesters for function, but the AR was the first to show this problem. I had never checked the cases before now so I just noticed the bulge. I keep the conversion clean but I guess I'll clean it again and stick with the federals and call it a day. Thanks again. |
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