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Posted: 2/14/2006 1:35:15 PM EDT
| I just shot 30 rounds of new Winchester USA Q3131 ammo from my AR and about half would eject the spent case but not throw the bolt back far enough to pick up the next round. The very last round again ejected the case but didn't come back far enough to leave the bolt open. Tryed different mag's one being a new USGI with the green follower but still the same problem. I just cleaned and oiled the gun and action so it's not sticking from lack of attention. Tryed some old China Sport ammo in it next and that shot great like it always does, no problem. Can anyone sheld some light on this for me. I would think that if I was to have this kind of problem it would be with the China Sport ammo and not the Winchester Q3131. Also the troublesome Win. ammo is all stamped 04 & 05 dates. |
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Sounds odd.... a NATO spec chambered weapon NOT running on milspec pressure M193, but running on import stuff. Is the weapon cleaned and lubed per the TM, with CLP? Use a chamber brush to remove all the gunk from firing steel cased ammo? Have you taken ONE round of the Norinco, insert into a mag, fire, and ensure norinco locks back the bolt 100% of the time, shot after shot? You could be short stroking all the time, but the Norinco just extracts better... not sure. If you truly believe you are short stroking, examine the gas system, starting with the carrier key, and ensure it is tight, and staked. Pretty rare to see a colt carrier popping loose. |
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My 20" Bushy does the same thing with q31. Tried it tonite after I read this. Value pack 55fmj, bolt stays open. Q3131 bolt doesn't. Brass doesn't fly as far with q3131 as with the winny white value pack. The q3131 is hotter than the 55gr value pack ammo. The primers are more flat with the q3131. Curious as to what you figure out with this. Ben |
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Start here www.ar15.com/forums/topic.html?b=3&f=66&t=263175 I have the same problem with a brand new Bushy 11.5 barrel with the 5.5 supressor. It doesn't matter what kind of ammo cheap or expensive, military or civie, it jams. It's being sent back to Bushmaster as I post. I'll post the results of their findings. C.M. |
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I do not know if this is related or not, but you might can check-out this link: www.ar15.com/forums/topic.html?b=3&f=16&t=268664 |
That link concerned a bad production run of 1999 only Q3131.... he posted his are '04 and '05. |
that was good
My question to the left is, You're still here?? (Mr.Penn) Mr. I can't quit smoking while bush is president. waah waah
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Tomvs8 try using other brand of ammo besides the Q3131 and see if you get the problem solved. I would assume at this point that your particular Q3131 loads are watered down. I have or use to have 100 rounds of Q3131 load and fired about 60 of those rounds without a hitch. But then again the year stamped on the brass are 94'. 
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Is your rifle brand new? Sounds to me more like hardware than the ammo. You need a little bit more diverse selection to see if it's ammo related. Like some black hills, WWB of another variety, .223 pressure maybe. I don't know, but if these are the first few round you put through your rifle, I would not be surprised. Also, maybe your mag wasn't seated all the way? Could be the ammo, but doesn't sound like it to me since it works fine now. |
| I'm was thinking it might be a mag issue because in thinking about everything i remembered that the mag was in contact with the padding i had lain on the bench. Maybe this tipped the mag slightly and caused some feeding problems. Will be shooting on my range soon as the weather here in Michigan improves a little (1-below zero this morning). |
That can cause feeding/cycling issues.... forcing the lips to rub the carrier, for sure. Which is why you should never use the mag as a rest or grip it while firing. |
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I said I would post what Bushmaster found on my AR, so here it is. The repair order says, " Exchanged weak extractor spring. Relieved tension in neck area of chamber and polished. Deburred and polished feed ramps. Test fired OK 90 rounds." I'll try firing it tomorrow and post the results. C.M. |
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