03-18-2011, 02:43 PM
I had similar problems. I traced it back to an overpowerful extractor spring. The overly powerful extractor spring pushed the cartridge onto the opposite side of the bolt so hard that it couldn't pop off quickly enough to get out of the bolt's recess while the bolt was functioning. When I removed the little donut around the exractor spring, the cycling problems went away.
A good way to test this is to slip a case under the extractor as it would be in the firing position. When you release the pressure that holds the case in position, the ejector should instantly throw the case clear of the extractor. If there is any hesitation or stickiness prior to the ejector working, the case can't get out of the way before the bolt will be going forward again, and will cause a malfunction.
A good way to test this is to slip a case under the extractor as it would be in the firing position. When you release the pressure that holds the case in position, the ejector should instantly throw the case clear of the extractor. If there is any hesitation or stickiness prior to the ejector working, the case can't get out of the way before the bolt will be going forward again, and will cause a malfunction.