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Post by velvetant on Nov 20, 2016 20:14:16 GMT -8
If you drop the dummy round in the chamber then close the bolt do you still have sticky extraction or is it only from the magazine?
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Post by velvetant on Nov 20, 2016 20:23:50 GMT -8
Do you have good neck tension? Usually you get bullet set back if you don't but maybe the bullet is getting cocked in the case. I really doubt that's it just tossing things out to look at
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Post by GLSHOOTER on Nov 20, 2016 20:25:00 GMT -8
Make up five cases. Not loaded rounds. With the upper off drop each one in the chamber. Sling the bolt by hand. It should close easily. Now extract with the charge handle. They should come out slick as owl snot. If not turn your sizer in an eighth turn and do it again. You have fired cases to measure and at 0.003 bump most guns run like a sewing machine.
You can set a die up in less than five minutes if you have fired cases to verify bump using a Hornady HS gauge or a fired case that will go over the neck and a calipers.
Greg
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Post by zr600 on Nov 20, 2016 21:15:15 GMT -8
Ok I tried sizing some new hornady brass it measured 2.092 after sizes in ch4d die it measured 2.089. Still won't chamber. Don't under stand what is going on. I gave up for the nite to frustrated. GLShooter would you be able to talk tomorrow morning sometime to talk me through it kind of. Right when I think I have it figured out this happens. This has happened to me 3 times now. Don't know what I changed. I wish I was in driving distance of you or Ritch.
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Deleted
Deleted Member
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Post by Deleted on Nov 21, 2016 3:16:13 GMT -8
Ok if I do what u say I did it with a funny round it went in and come out. But I tried to feed it out of the mag and the bolt wouldn't close had to tap the butt stock on the ground and pull the charging handle at the same time to eject it. Maybe it's just the shoulder needs to be pushed back further. Another possibility is your bolt. The ejector could be on the long side and catching the base of the case. This will make it appear to be a magazine issue, when in fact it's not. If your brass is tight and you have a long ejector it's going to be a fight to make it run. Eliminate one problem at a time and you will find the culprit.
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Post by GLSHOOTER on Nov 21, 2016 5:57:34 GMT -8
I'l send you a PM later but Ritch may have it also.
Greg
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Post by GLSHOOTER on Nov 21, 2016 7:26:23 GMT -8
Dehorning the ends of the etractor often helps as is a general polish. Here is a pic of one dehorned on the ends. It doesn't take much but lets things slip up in the bolt face better in concert with the shoulder bump. Greg
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Post by zr600 on Nov 21, 2016 9:24:05 GMT -8
Ok I thought of one possibility that I might have over looked. If my brass was over length and not trimmed to length?
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Post by GLSHOOTER on Nov 21, 2016 9:31:26 GMT -8
Ok I thought of one possibility that I might have over looked. If my brass was over length and not trimmed to length? Possibly but extremely unlikely. It would have had to be fired several times to be overly long. Measure a few and you'll see that you are probably GTG on that area. Greg
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Post by zr600 on Nov 21, 2016 10:16:38 GMT -8
So ritch said the ejector could be long is that what dehorning the ejector takes care of? How do you tell if the ejector is to long?
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Post by GLSHOOTER on Nov 21, 2016 10:30:32 GMT -8
So ritch said the ejector could be long is that what dehorning the ejector takes care of? How do you tell if the ejector is to long? Actually we do both if needed. The ejector is often to long and will set ABOVE the opening in the bolt face. Polishing that down to bring it below flush and gently rounding the edges helps on that. The long ejector showed up a whole lot at one time. I'e only had one but it is an easy fix. It's one of those things that Ritch fixes when he builds uppers for people. It is often an overlooked area on many builds. Greg
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Post by zr600 on Nov 21, 2016 11:04:46 GMT -8
What to use to polish it down?
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Post by GLSHOOTER on Nov 21, 2016 11:13:56 GMT -8
What to use to polish it down? A Dremel with a stone if it is quite high and then a Cratex bullet tip to polish it up. On the extractor just the Cratex. Greg
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Post by zr600 on Nov 21, 2016 11:35:17 GMT -8
Ok I got my die set. Pushed fired piece back .003 and I took the upper off the lower and can get it to chamber and close and pull back on the charging handle and it ejects fairly easy nothing like before. Now what would be next step try it out of the mag on the lower?
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Post by zr600 on Nov 21, 2016 11:45:26 GMT -8
Ok I put the lower back on and can get it to chamber out of the mag when I let it slam home but can't get it to eject with out tapping the buttstock on the ground. Is this an ejector problem then?
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