Several yrs back there was a discussion on this forum about the fit of rotary bolts. When Alexander Brown came up with it he conceived it as a "Dual Purpose" bolt to both hold the bbls down to the action, & also to hold the standing breech "UP to" the bbl breeches. This was stated in his patent & some early statments he made concerning it. At the time a good number of members here did a "Smoke Test" on their rotary bolt guns; Smith's, NID's & Foxes & not a single one as I recall found the fit for that 2nd function, so in effect the rotary bolt offered no "Real" advantage over the simple wedge bolt of a Stevens.
Anyone ever check the fit of parts on an old Singer or Wheeler & Wilson sewing machine of this same era??
