In answer to "How common are .22 LR Pope barrels?", I have kept track of the ones I have either owned or considered buying over the years. 8/18 H M Pope barrels were .22 rimfire, it looks as if one of those was actually .22 short as the twist was 1:25. Stevens Pope .22s are a little less frequent with 6/24 .22 rim, again with one a short. The percentages seem reasonable to me given that the Stevens Pope barrels are from the early 1900s while Pope continued making barrels for several more decades. My "most recent" was made in 1935, but I am sure there are others made later than that. I have yet to find one on a Winchester 52, but they must exist.
