ORIGINAL: Twong-on
A heavy bullet will be more stable traveling through brush
Never depend on ANY bullet to be stable traveling through brush. It's a crap shoot at best that will eventually end poorly in some regard.
A bullet and broadhead tipped arrow kill by two TOTALLY different mechanisms. They should not be compared as though they are NOT the same.
Browning.308 - consider selling your "man's gun" so you can buy yourself some maturity with the proceeds.