My rule of thumb has always been only take clean shots. It's really a pretty simple concept.
Thanks for the valued feedback and I hear you loud and clear. But, what are each of us comfortable with in terms of a *clean* shot?
...50 yds, bench/sandbags, no wind, no dragon flies in the air
There are a lot of situations ranging from target practice to high dollar trophy hunting.
With targets, you have the opportunity to setup the shot as you like.
If I run up on some wild hogs, I'm taking the shot even if there is some interference (provided that there's no safety concern ...for humans anyway). Those things are a huge pest here.
I tend to be a lot more conservative with other game.
Even so, terrain and situations vary from NM pronghorns to Cape Buffalo.
Then again, you have law enforcement, personal defense, and millitary applications where you might have to shoot through glass or something.
The feedback has been all good. And, I've searched around and found some ad hoc studies, but nothing definitive/scientific. I guess the number of variables are too great.
So, clean shot is the best policy whenever possible. It just doesn't cure my curiousity.
I suppose the millitary has a lot of info. If those guys miss, the prey may well shoot back.