I shot a deer this year through small limbs and brush. The deer was maybe 10 feet beyond the foliage. I was shooting 140 grain Fusion bullets through a 7mm-08 at 75 yards. I could see most of the deer in my scope on 3x. When I got to the POI I looked back at my stand. W was surprised at what was between me in the animal. (More context: He saw me first, crouched down below some brush where I could only see horns. A minute later he stood and started back where he came from when he stopped. This was all hardwoods with some thickets scattered.) When skinning the deer with my friend, he couldn't decide which side contained the exit wound. Both sides showed a circumference of a tennis ball. I assume my bullet was tumbling when it hit. Since I almost solely hunt thick stuff, should I move to my .30-06 and shoot 200 grains? What best keeps its course/direction/vector when hitting light brush?