The more cavernous the wound channel, the more room there is for internal bleeding, thus the faster the drop in human blood pressure and incapacitation.
But there's a difference between paper "more" and living tissue "more". A difference in bullet diameter of .60 to .70 looks significant on paper, and the number looks even greater as a % increase. But in living tissue, it's no where near enough of a difference that it would decrease incapacitation time from hypovolemic shock. Again, you would have to have some extreme/rare instance where by some miracle a .10 change in diameter saved the day, and I would say the odds on that would be a number with a LOT of digits..
