Shoot what you have man, I shoot for my long range rig right now a factory contoured Model 70 300WSM Classic, granted it has a magnum contoured barrel but not a super heavy rig. The Burris is decent glass, I have owned quite a few of the less magnifications (3x9) the only thing I can fault them on is the European Style magnification adjustment, so now I shoot Zeiss
, but really as long as you are out shooting you can shoot that factory rifle until you outgrow it. I had the very model you have but in 243 and it shot sub moa with handloads all day long, just becareful the thin barrel will heat up and start to walk if it's not floated. But have fun!