OK I finaly got my rifle built. Took it out to shoot, it ran good for a new tight gun. I had to buff off the sharp edges on the extractor. The next problem I have is the fired cases are landing about 1-1:30. This tells me the bolt is coming forward befoe the case is out of the gun. I have a 5.2 oz buffer in the A2 tube. Thinking that a Tubbs flat wire spring might help but is there a heavier buffer that could be used, or should I get a hydrolic buffer?
Sound like it's over gassed. I'd try an adjustable gas block first.
+1: Over-gassed. Is this the gun that was/is having problems with Wolf 120gr MPT's, as well as Hornady? Your action is cycling way fast, which could explain the failure to extract issues too.
It might have a gas port that is larger than usual, or if you have a mid-length gas system, it is getting too much dwell time, especially with the 120gr class bullets and a 20" barrel.
I wish we could see some pics of the rifle, and more details about it, in order to help diagnose these issues, and get her running like a champ.
This rifle is a J&T 24" bull barrel it has a rifle length gas system. Overgassing would also contribute to this but other than where the brass lands this thing runs like a champ. Put 100 rounds through it today without a single FTF or FTE, shot sub MOA groups with Hornadys. Pc is down and I can't figure out how to post pics from my phone. I will keep you posted.
Sent LRRPF52 a pm
Does your extractor have an o-ring placed around the spring, if it does remove the o-ring and reassemble the bolt. I had to do this on top of filing the fangs off of my extractor, and now my rifle (J&T 24" Bull brl) functions perfectly. Brass in landing at 3 o'clock at about 3-4 ft. away.
I did remove the o-ring after I found it was gouging the brass.Originally Posted by Bwild97
Was your brass landing in front of you?
Ya, when it would actually eject. some times it would hit me in the face (lefty). It was really beating the shit outta my brass too, holding on to it and slamming it into the front of the ejection port, severely deforming the mouth of the case. I had to file fangs down to nubs, I can post pics if you like?
Last edited by Bwild97; 03-26-2012 at 05:20 PM.
Please post pics. But after thinking about it an adjustable gas block is reasonable. A larger caliber with a larger volume of gas, the same gas system may very well deliver too much gas to the bolt. Also talking to a buddy of mine he found up to 50fps increased velocity in a 308 by adjusting his gas system.
Sorry it took so long I was shooting all day
Extractor1.jpgExtractor3.jpgExtractor2.jpg
Im not so sure if an adjustable gas block will solve the extraction issue, we have the exact same uppers and this all it took to solve all of my extraction issues.
Last edited by Bwild97; 03-27-2012 at 03:37 AM.
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