Your Vanguard is made by HOWA in Japan....an EXCELLENT company. While not a belted magnum, the .25-06 PERFORMS akin to the .257 Weatherby Magnum with the right handloads. To get the 'most' from the rifle, I'd forget the 6X scope and go with your variable. The .25-06, with the right bullet/powder combination CAN BE a 400 yard deer round.