Re: Sighter shots while hunting.
A couple of years ago I was on my hunting hill working my way over to some deer that I spotted. Some a-hole a mile or two away emptied his gun, reloaded and emptied it again. The deer stuck around for the first shot or two, then bolted to the next county. If I would have fired a shot, I'm sure they would not have stuck around. You never know though - I have seen deer that have just been shot at run and stop 50 yards from where they were and look at you. I think it depends on how much pressure they have been seeing.
Don't you trust your drop chart? I know you can hit first shot at 400 or 500 yards. Plus I know the temperature now is pretty close to the temp we shoot at in the spring.
Why the need for a sighter round?
I keep nature balanced - I hunt everything!