I think you're right and honestly with a 6gt and a 7saum, I can take care of everything I need to. I tend to find a load that works and stick with it. Should be pretty easy to do with these two cartridges.I have 3 rifles that I switch barrels. I've found that unless you really like always rezeroing/ checking zero. You're better off with a main barrel and then the other barrel you only use for certain hunts or times of the year.
I have my rifles setup for hunting/ shooting around home and then different barrels for prairie dogs. Kinda hard to justify 4-5k for 3 rifles that i only use a week outta the year.
I think when you get more than 2 barrels for a rifle you end up spending more time checking zeros than you do shooting the caliber you want to.
it's what i'd do also about opticsI've been using West Texas Ordinance switch lug rifles for years and love them. No nut, no headspacing, repeatable zero. One in long action std boltface, one each long and short action mag action. Something like 12 barrels between them. Zero your rifle, then record your scope settings. When you change barrels, just re-dial and start shooting.
Easy peasy.