I mainly use Wilson bushing dies and seaters. I'd build a 280AI and 243AI I'd pick up Redding Type S FL and neck sizer for each rifle just to try.
Good dies I've shot some small groups using them and I like that they include a undersized retainer in place of the expander ball. On my non tight neck rifles I'll clean up the neck and Wilson bushing fit the Redding dies so I have a pretty good collection.
It's hard to say in a factory chamber rifle if groups will improve using bushing dies. For me if rifle got a good chamber having that option of using bushing dies to adjust neck tension may help fine tune a load.
Hard to say on brass life alot depends on how hard your pushing them.