What's the definition, for this discussion, of a "common cartridge"?

Cartridges that most people on this site have heard of is a far cry from cartridges that the average hunter at a deer camp have heard of. There's a lot of cartridges already listed on this thread that the vast majority of hunters have never even heard of.

Those who must raise their voice to get their point across are generally not intelligent enough to do so in any other way.