Well, none of my rifles are easy to find ammo for anywhere: (300 SAUM, 280 Rem, 6mm Rem, 444, 7x57) except my 30-30...
good arguments made for the 308...
good rationale for a moderately loaded 300 WM...
and of course the 270!

lol...
i do believe i can get good performance out of one powder (RL19) and 100s in the 6mm, 160s in the 280, and 200s in the 300SAUM, with partitions and Nosler reload data...