Deer aren't too difficult to kill, but I am highly skeptical that you would ever get a bang flop at 100 yds with a .357 barring a head shot. More likely you would either spend a long time tracking it or you have a wounded animal running around. I hunted most of my life and grew up on the farm and I've never understood the mentality of taking the absolute lightest caliber you can get away with. When you go light, even good shot placement doesn't necessarily translate into a clean kill, or a kill at all for that matter. That's just my 2 cents, but I'm from a different generation