I used to agree with Arthur on this one but now I believe it to be a more individuall choice.
Bullhockey I say.[8D]

I'm with GMMAT. Center the gang and you're much more accuarat. Not only that you're not as likely to change your anchor or adjust your body to get a decent sight picrture on longer shots. ... and TFox, you were using a single site pin in a scope. Centering a single pin is like centering the whole gang You're center the brackets.