Back in the mid-60s dark ages when there still were only two regiments/USCC, we'd check out standard 150gr commercial hunting ammunition
at Central Guardroom; grab our M14s from our room's rifle rack; and go deer hunting in the hills/training areas/ranges around West Point.
150 & 165gr softpoints (if my ancient age remembers right)
Was good enuf' then.
Still good enuf' now.