...you NEVER reload them, then I see no benefit in keeping them
Yes, but you MIGHT someday.... Every reloader who has components and/or equipment for calibers that don't fit any firearms you own, raise your hand.
You never know, I might wind up with a .22 Hornet one of these days....
In all seriousness, depends on what your definition of bulk is. If you have 5000 and have no plans to load them, I'd try to trade them for something you want. If it's a few hundred, eh, you never know...