I have a “watered down” version of this, one of my hunting rifles is a stainless tikka lite 6.5cm and I also have a 270win barrel and LA mags/bolt stop for it. 270 for copper-bullet velocity from sept-dec, and 6.5cm for practice from january-august. I dont reload, so this was an easy-to-find-ammo-for rig that covers any need I have from practice to elk reasonably well.
22cm, 6cm, 6.5cm, 7-08, 284win are all on a standard bolt face, right? I believe you could load any of those long with the standard M+ or LA magazines in a tikka.
I’m guessing if you are going to all this trouble you are getting barrels turned or prefits so you can chamber and twist however it makes sense and not be confined by factory twist rates.