RE: To shoot thru or not
If you prefer chasing down your deer then go for overpenetration. If you like to walk up on them where they died in their tracks then go with the rest of us....
Of course there are more variables involved than this.
pass through is no guarentee of running and vise versa.
But in general, more energy on target > hoping it bleeds to death before it runs down into that nasty canyon.
Hence the modernhunting bulletdesign.