That's the great thing about hunting, we can all base our diff ideas on diff experience.Doesn't mean right or wrong,just diff ideas.
If you wanna take body shots that's your call,personally when clients(regardless of what they are shooting)
want a badger for a rug, or a mount, I recommend head or neck shots. I don't like to shovel.
As for center chest and exit thru the back,that to me is not a "poor shot", guts, butt,low chest,any leg, all poor shots.
I'm closing in on 500 badgers killed myself or by clients,I've seen plenty go down a hole due to poor shot placement.
My point is "a poor hit is a poor hit, caliber does not matter"