Don't confuse close misses with spotting shots. A miss is simply that, a miss. A spotting shot is typically taken when you are unsure of the conditions affecting the potential shot and you want to see what happens with your shot at long range before taking a shot at the animal. Spotting shots are only taken at longer ranges and under conditions where you can spot your shot. The spotting shot is typically taken at the same ranges as the animal but around 100 yards or so away from the animal. Those that have commented about using spotting shots also say that if you do take a spotting shot and note the impact that you should get the real shot down range as quickly as possible before conditions change.
I have always felt that if the conditions were so unpredictable that I needed a spotting shot then I wasn't going to attempt the shot at a game animal. This is just personal preference. I hunt in a lot of canyon country and the winds are too unpredictable to give me the comfort I want when attempting a long range shot if it can only be partially predicted by a spotting shot.
One day, during a verrrry slow session of deer hunting in an area that had normal to heavy pressure from hunters, we spotted two does bedded in light snow in a bowl at slightly over 1000 yards. They were laying facing each other and broadside to us. There was absolutely no wind and conditions were ideal had there been a buck with them. About 100 yards to their left was an open spot of dirt with no snow on it. My buddy and I had glassed them and the subject of spotting shots came up. Since it was a day with perfect conditions for the shot, I picked a spot in the dirt to their left and put a bullet into said spot. I spotted the impact and my buddy had the spotting scope on the does. They had absolutely no reaction to the shot. At this range I think that the fact that I use a brake also makes the sound at their position less than if I didn't use a brake. In the next few minutes I put two more shots into the spot on the open dirt and the does didn't react to any of them. My buddy doing the spotting on the does said they didn't even move their ears.
Since we got no reaction to the shots from our position into the dirt we decided the next test would be an impact on a rock at their location. At the left side of the dirt spot was a rock that was just slightly smaller than the vital area of a deer. I set up for the shot, used up the last few ounces of trigger pull, waited the normal time, saw the impact on the rock and heard the impact of the hit on the rock. My buddy was watching the does through the spotting scope and said their first reaction was when the bullet hit the rock. Their reaction was one of immediate flight away from the area and they didn't slow down for probably 500 yards and finally disappeared from sight over a slight ridge at about 800 yards from where they had been bedded.