I hunted [deer] with the 357 for nearly a decade and have many stories, most of which can be summed up like this:
Deer went down upon the shot. Deer struggled to its feet and crashes away.
Deer recovered about 60-yds distant.
Bullet went clean through "the 10-ring" (heart/lung intersection) with no sign of expansion at all, (from commercial loads of 125gr HPs during the '80s, before the "good" hollow points were common.)
Here is the story of ONE of the TWO bullets that were ever stopped by deer from my 357s.
There I was, (sorry, I couldn't resist,)
I rounded the spine of a hill and there was a mule-deer doe walking straight away. I took careful aim BETWEEN the hind legs, looking for a path to the 10-ring.
When I saw what I was looking for I fired.
The deer gave a little hop and continued walking as if undisturbed but also turned broad-side to me. I presumed a miss and re-aimed at the 10-ring from broadside and fired again.
Struck a bit high, the deer flinched at the impact but otherwise seemed unimpressed.
Confused by all of this, (it was my first mule-deer) I began to try another shot but as I did, the deer stopped and, very casually, settled itself down and died.
The first shot had been true. It "burned" one thigh on its way into the belly and proceeded in a straight line to and through the 10-ring and came to a stop in the brisket.
That bullet was whatever 125gr hollow-point was being loaded in CCI Blaser ammo at the time, ('85-ish?) When recovered, it had NOT mushroomed at all. The exposed lead of the bullet had expanded to approximately the full diameter of the rest of the bullet but the jacketed part was unchanged except for rifling marks. ( I later learned this was common performance for "ordinary" HP bullets of the decades prior to when bullet makers got with the program, the '90s. A hollow point never really meant reliable expansion in handgun ammo back then.)
Actual penetration was about 18" to 20".
The other shot went through both shoulder-blades and the top of both lungs in typical fashion. Both shots were killers.
Approximate distance for these shots, 1st shot = 20 steps, 2nd shot = 28 steps.
All these shots were made for a 4" barreled Colt Trooper Mk III.
I shot a lot of "things" with that gun until it was stolen by baggage handlers at the Denver Airport, (never recovered but the Air-Line paid for a replacement without quarrel.)
That's my story and I'm sticking to it.