RE: How do you sight in?
If a sniper wants to give you advice on shooting technique I would take it to the grave with you regardless of how "crazy" it sounds.
These guys shoot at people for a living under high stress conditions. They do things the way they do them for a reason. One mistake can cost you and possibly others lives.
I have had the chance to go shoot with a trained sniper a couple of times. My roommate in the Air Force had a cousin that was one and he came to visit now and then. Not much fun to shoot with, but he was impressive. I don't care what weapon you gave him he could hit with it.
Paul