I shoot the same things in those situations I do when it's open; .243, .25-06, 7.62x39, .30-30, .303 Brit, .300 Savage, .30-06, etc.
The idea of "bucking brush" with a bullet is complete horsechit. You shoot through holes in the brush, not through the brush itself.
America needs to understand that our troops are not 'disposable'. Each represents a family; Fathers, Mothers, Sons, Daughters, Cousins, Uncles, Aunts... Our Citizens are our most valuable treasure; we waste far too many.