RE: BT's and brush?
That is the test I refered to .
If I remember right the winner for best results was the 223 with a 55gr FMJ.
Not a hunting bullet.
I saw a nice buck shot in the ass by a guy shooting a 12 gau slug ,he hit a 1/2 diamiter branch 10'-12' from the deer .
It took us 2 miles and 8 hrs to recover that deer.