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Posted: 8/12/2015 8:49:40 PM EDT
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I think I about have my 10mm DI gun sorted out, but have started seeing some ejection issues. I am using a 6.8 SPC bolt. A spent case fits well in it and in the ejector and if I hold it down and release it the ejector flicks it out quite well. A live round will eject running the bolt by hand, but a empty case will not. What I am seeing is that when the empty case clears the locking lugs the ejector pushes it out against the inside of the receiver. At this point the ejector has ran out of stroke. A live round the bullet makes it enough longer than it is held into the stroke of the ejector until it has cleared the ejection port. I think this may only be happening since the mouth of the case is so much wider than the mouth of a 223 case. It is mainly making contact and the very top and bottom of the opening. Is it safe to open up the ejection port up to the barrel extension? Thanks! |
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you need to raise the mag probably.....QC10 lower? If you aren't having to crease the bolt carrier on each side to clear the feed lips it isn't high enough....also ...rond the nose of the follower....and bend the mag spring up at the top to place more pressure on the rear of the follower. The mag latch on a QC10 is a little narrower than I'd like......very functional for its intended purpose....but is significantly narrower than the slot on the mag that accepts it. Some Large frames came equipped with a lower catch for DI45's. QC10 has changed back to the original position more suited to blowback uppers.
I am planning on making a solid model soon and making mag latches to fit the QC10 large frame to be supplied with my uppers to optimize mag location. |
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just round the point on the follower so it doesn't try and hook on the locking lugs of the bolt......
the spring...you just bend the top up a little to put more pressure on the rear of the follower. When you take it apart you'll see what I mean...... also rounding the corner of the two locking lugs on the bottom of the bolt where they drag back over the round as it cycles...it can catch on the case rim and make it point up in an un natural way....causing a missfeed. |
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