I've cleaned and lubed them both. They're the original factory magazines. They have a rough parkerized-type finish, so the follower may just be dragging on the inside of the magazine.
I've loaded and unloaded them a few more times now, and it seems to be getting a little better, but they're not quite "right" yet. The first time I tried to press the follower down with a cleaning rod, the follower tilted and stuck in the magazine body.
I'll keep loading and unloading them and see if they keep getting better. If not, I might try polishing up the follower a bit with some 2000-grit sandpaper.