The shop I got mine from bore-sighted it for me (just a cheap Simmons ProHunter is on it) and I was on paper to start. Since I'm bad at math, it took me 3 boxes to get it sighted in (some 5 years ago) and it's been good since. When sighting or test firing it before the season across the top of my car, I *always* wear shooting glasses because no matter how careful I am to stay back from the scope, it will always get me it seems.
However, when I'm standing in the field or resting against a tree, I've never had the scope touch me -- and I tend to get rather cozy with the scope, too.
For reference here, I shoot Remington Copper Solids in 3". The accuracy of this shotgun (rifle?) is very satisfying...