all purpose rifle...defense & distance
target shooting...most bang for the buck...
Barring a semi-auto/"assault" milsurplus caliber that I do not regard
as cannonically compatible with "distance" and (precision) target
shooting), I'd still get a used/sporterized `03 at a gunshow, or a
30-06, of course.
(best fit "all purpose" cartridge -- arguably of all time)