sounds like we're on the same page now, and debating about what is and isn't high risk. a fair topic, now that we're done arguing. I feel that if I can hit a small grey squirrel on all fours broadside at 50 yds, I can shoot a deer in the "dome" of it's head. I hear deer move their heads a lot, they don't when they're not spooked! I've never seen them move as much as a squirrel either. That's my reasoning, flawed or not. I am much more careful with deer, as they are quite a bit harder to kill, but their heads are easier targets than a squirrels entire body. My issue with chest shots on deer is that I cannot see the positioning of the bones and viscera, and lots of layers means lots of POTENTIAL deflection. It's almost a give-me that the animal will die, but the time factor concerns me. I shot my buck there while he was on the move (between trotting and running) and sure enough the shoulder blade pushed that bullet off course. He WOULD have died from that wound, PROBABLY within the hour, probably would have gone into shock even, but I was scared to find out. While you may think I had buck fever for sure at this point, I still had the calmness to figure out where his vertebrae were and tag those immediately after while he was still moving (with a bolt action, not a handi).... for me it reinforced that those bones are (especially when moving) able to push bullets off course. If I'd have just shot him in the neck I'd have had him down and done the first shot. That'll probably be where i aim from now on, as it is the ONLY time I've ever seen a deer flop over and go limp. As for your guns, your ammo, your deer and your shot placement, do as you must. I'm honestly scared of bodyshots, they aren't off limits but I usually cringe on doing so.
I've done a lot of shooting, not a lot of big game shooting though, which is where the ignorance came into the equation. I took a "high-risk" shot that "threaded the needle" through tree branches, the brush the deer was behind, and the grass by it's face- I had zero anxiety because I had been practicing freehand/standing enough to hit dimes at 50yds consistently- the deer was still and nibbling buds and unaware of any danger. I took my sweet time lining up, got my breath under control, felt as emotional as sighting in a scope. I focused in and out a few times, squeezed the trigger a few tries while the hammer was down to be sure I was settled. This was not a snapshot, there was no pressure. There was no last second movement from the deer, my hands were still, my heart calm, no wind. My statement of high-risk was regarding the difficulty in making the complex/demanding shot, not my judgement regarding the potential lethality of a brainshot. I still do not believe it's in question at all, if the bullet gets there- which is where I was so wrong. You brought up bullets deflecting, I've heard that too, that's why I wanted to go through the eye socket (or mouth). I've heard of people shooting up the nose, I'd not trust the nose to keep the bullet in line though. As for my recent shoulder shot that right-angled, the buck was in the open and the 150gr sierra #2125 only hit the edge of the scapula/shoulder blade, it didn't hit the socket within. It didn't even bust the shoulder blade, DID manage to bust the left lung somehow (energy transfer when it fish-tailed?!) and the bullet hole leaving the butt was nice and round, I don't think it even opened up! The only thing I TRY to hit shoulders with is 45-70 (too many loads to get into, and they DESTROY the entry site straight to the exit, but still FAIL to DRT in my experience).
This conversation got me to finally load up those 95gr SST's I've had sitting around since last christmas I think. The last day of "firearms" season is tomorrow though. Gonna have to wait till next year for the .243.
Hear that papadave, 45-70 and .308 win aren't knockouts either. This much I am ABSOLUTELY SURE of, whatever you're afraid of with .243, can happen with bigger. It has for me!