FWIW,
.308, .223 AI, & .17 HMR...
Something mild, accurate, and 6.5mm deserves to make it on that list... Thinking the 6.5x47L, the Cringemoor, or the .260 Remington. That the first two work so well with a stock Remington Magazine Box it is hard to push the latter.
Regards, Matt.
