To true.
Take any calibre you like....Shoot enough deer and you will have your losses. When you shoot the open tops even the tips of the tussock can destroy a bullet on the way to a target and wound instead of kill. In the bush contact with a twig or a stick will destroy any projectile on its way to the target. The bush bucking capability that people might tell you about of their own high powered rifle can be pretty well ignored.
If in doubt go into any really dark patch of bush or jungle someday and fire a 20 round burst of tracer through the trees ..308/5.56 take you pick it wont make much difference. You will see that a larger percentage of these projectiles than you might think end up spinning off an nearly a right angle to the line of sight.
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