direct quote from Ruger.
"One must use Caution when operating the bolt stop, and the
correct use of release button. If the bolt stop button is used incorrectly, the
internal piece of the bolt stop will become rounded, and will not lock bolt open
after last round fired. Once the bolt is locked open The correct procedure for
releasing of the bolt is to pull the bolt back then pull down bolt stop release
button, then release bolt allowing it to slam shut. If you should need further
assistance please call our Service Department at 928/778-6555 between 8:00 -
4:00, MST Monday thru Friday, at a time convenient for you. A Ruger
Representative will be happy to help you."