I am all crippled up from 6 crashes over my lifetime. Just average size yet i shoot 375rum, 340 wea, and five other magnums and african calibers. How is 270, or 257 bee considered high recoil?
That being said, most of those are not plinking calibers. I have had the 375 rum for about 16 years, total round count is under 150. Projectile cost, as any of those are reloader or bank loans to shoot. While the 2506 and any quarterbore are pleasant, 2506 ammo is not Canadian tire common. Furthermore, projectile development has not been driven by target shooting or a flavour of the year craze like 6.5 creedmore is to .264. I would doubt any .257 bore is in the top 40 selling reloading dies.
So quickly:
Pros
Low recoil for small framed/sensitive shooters
Chambered in many rifle types and brands.
Suitable for larger game than .243
Brass easily formed from 06 family
Cons
Largest projectile 120gr
Uncommon availability as ammo, in retail.