This video that looks like a spine shot? Deer tend to drop super fast when hit there
http://prbullet.com/duplex.wmv
This one dropped instantly too with a 185gr bullet at well over 100 yards. I watched this happen a few years ago.
Sorry but there is a big different between controlled expansion and a a bullet that performs like a varmint bullet. Thats probably why we dont use varmint bullets in centerfires for deer either. Thats why they make a huge variety of bullets for calibers like .243 and 25-06 which perform ok when the proper bullet is used.
There's a reason REPEAT Powerbelt users keep going back to the store and buying more opf those bullets. There's a reason that bullet reamins a top-3 seller in this country.
Yes there is, its called marketing and not knowing any better or simply assuming thats as good as it gets with a ML.