Same extact thing happened to me several years ago with a NIB SR556. Frank White is a family friend and we took it down to him for inspection. He chastised me for buying the rifle in the first place and told me to send it back. Said out of spec chamber most likely. Ruger replaced the upper quickly and haven't had another problem with the rifle although I dont shoot it much anymore. I found this site shortly afterward and since bought 3 6920s and on a wait list for a BCM Jack.
Last edited by zlc; 07-12-13 at 12:12.
A gun is like a parachute. If you need one, and don't have one, you'll probably never need one again.
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