Try this division of gun interests:

Collector: may shoot his guns, but the central focus is the guns themselves. Collections can range from "hoards" to sharply focused groupings of very specific interest.

Collector-Shooter: Has a more or less specific field of interest, but his guns must be suitable for shooting purposes.

Shooter-Collector: Purchases guns to fill specific slots in shooting purposes. The shooting trumps collecting.

Shooter: happy with a balsa stocked gas pipe if'n he shoots it well.

DDA