New Army "Caliber Configuration Study"

[JASmith]

..The discussion is about general-issue, Ball ammo, not special purpose loads like AP or HPBT.

This statement completely misses the point and ignores your earlier comment on why steel core bullets were introduced by the US at the end of WWII.

There is nothing wrong performance-wise with using WC cores in general-purpose bullets. They might, however, be a tad more expensive and are not GREEN.