I hope the .220 Swift doesn't fade away. Only reason I don't have one is LH rifles in the Swift are pretty scarce. I will either have to get a Ruger or build one most likely unless I get lucky and find a Dakota at a garage sale. I would say the parent 6mm Lee is almost gone, want one of those too for some perverse reason or the AI version. There are a number of 22 rounds that are fading like the Zipper, Bee and the 222 which is still popular in Europe or was. They are still hanging in in an increasingly narrow niche. The Hornet has made at least a minor comeback, a Lazarus cartridge.
Forgot two other mediums that I want but don't have rifles for them now: the 358 Norma Magnum and the 8mm Rem. Magnum. Both are just barely hanging in there mostly because of rifle loonies.
