I just bought a 1916 BSA to work on (don't have it yet, more later!) and this prompted me to finally go back to the bolt problem on my No.4 mk 1 Longbranch.

The bolt tends to jump the track, that is the bolt head pops up out of the takedown notch about one time in three when the bolt is worked. To tighten it completely would bring it to about 11:00...normal? Think the problem is with the bolt, or the receiver rail?
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