And if you found what I was talking about you'd probably find a link to Bullseye's pages. Good stuff!No need to go there I put some pics of a worn bolt stop here in this thread. http://rugerforum.net/ruger-rimfires/58116-release-th-bolt.html#post697999
I am having this problem with a very new Mark III which I have a tendency to over-lubricate -- I've cleaned it up and off to the range to see if that solves the problem!An issue I have found several time is ... too much oil was applied to the stop bolt and over a period of time it turned gummy between the frame and bolt stop. This makes the bolt stop sluggish and won't respond fast enough to autolock the bolt, yet it will still lock by manually holding the bolt back.