I bought a savage 110,30-06 yesterday that came with a weaver vx9 that has an extra,adjustable,reticle.some sort of movable bullet drop adjuster it seems to be.has anyone here owned one of these scopes?could you possibly give a short tutorial on how to sight this thing in and use the other reticle line?thank you for any info you can give,deer season starts saturday and I was kinda wanting to use this new savage.