Capnrob,
An earlier poster mentioned a tight chamber.... I love my Cub, but ya, they might have a tight chamber. Never a problem feeding anything, but if I fire a bunch of shorts (which leave a dirty chamber in just forward of the case mouth which later catch on LR cases) or simply fire a whole bunch of dirty ammo, the rifle will start to hang up on extraction. The little extractor will slide over the rim of a stick case, leaving the case in the rifle. They pop put easy with a knife or screwdriver but I cannot get enough fingernail in there to get it done without some sort of tool.
The cure is simple: A small brass .22 pistol brush. Remove bolt, insert brush into chamber, and give it a twist. Remove brush and reinstall bolt. You are good to go.... You are simply removing the build of crud and crap in the chamber. Everything returns to normal. You can find simple twisted wire handle and pistol brush all in one.. I usually find these at gunshows and mil surp places for about a buck.
Just something to consider if you buy one for dedicated survival purposes. If its got a reasonably clean chamber, its a champ.
Fro