The principle of "overkill" in a broadhead is really a pretty simple one.........Im not sure why it is debated as heavily as it is. IF you can successfully and reliably shoot a large diameter ANYTHING, ANYNAMEbroadhead why would you choose not to?

Sure the notion that pretty much any decently made sharp broadhead of any cutting diameter perfectly placed will do the job pretty much everytime is true. But the notion of "Holding back" on cutting diameter to possibly SAVE a animals lifeon a marginal hit is almost kooky IMO. So all of a sudden the very deadly head that you put through both lungs is going to keep an animal alive because you hit the edge of a lung, liver and guts? WHAT?

(And from here out in the discussion I will refer to the broadhead as simply a cutting diameter to remove the emotional response some have toward a mechanical or brand name)

If I place a broadhead anywhere east or west of a double lung hit I want 3 things:
1. A large entrance wound
2. A large EXIT wound doubling the chance of blood sign and less likely to clog.
3. a far reaching lateral cutting diameter to damage as much tissue and vessels as possible

I've said this time and again........over and over. No one head is a magic bullet replacing shot placement, and different heads are best suited to certain set ups and the energy they produce.
Just like everyone craves more speed, more energy, more draw length, and the ability to draw more weight for hunting, why would you not shoot the most broadhead that you could reliably get pass throughs on for the vast majority of shots you will see on game?
To do otherwise borders on being almost silly.

IF we are taught to shoot the most draw weight we can shoot comfortably from any position why too shouldn't we shoot the biggest sharpest broadhead we can also safely and reliably use that compliments that set up?

Is there anyone out there that is going to tell me that if suddenly there was a 2" 3 blade absolutely scary sharp fixed blade head that was guaranteed to fly like your field points and penetrated as good or better than your current head that you would scoff at it or overlook it as TOO MUCH broadhead?
LOL look at how the average person picks broadheads or comments on them..."That looks wicked" or "Man is that a mean looking broadhead!"

Take Shultzy for example (gonna use ya Shultz sorry bud)
He's very experienced in traditional archery and has chosen his favorite broadhead very wisely.......its a large cutting diameter strong 3 blade cut on contact head(Magnus Snuffer). I'll venture to guess its the biggest baddest head he feels comfortable shooting through his heavy poundage recurve whichis packing more punch than most other trad guys. These are the biggest baddest mean arse heads that he can probably reliably use and he uses them to his advantage.
On the flip side someone with a 25" draw length and shooting only 48# from his longbow wouldn't be well advised to follow in his footsteps........that persons biggest and baddest will mean something different.

The broadhead is the killing tool........quite simply you owe it to the animal to choose one (without getting specific on brand) that compliments your set up, and game you intend to hunt while causing the most damage possible at the same time.
For some people that will be a simple 1" 2 blade cut on contact , for others like me and my 30" / 70# compound that might mean a 2" 3 blade cut mechanical head.