Actionmike:

Go to www.weatherby.com and compare both actoins, or get your hands on a Weatherby catalog, or even better cycle both actions and feel the difference.One reason Iprefere the Mark V action is it has a 54% bolt lift,and the Vanguard action has a 90 % bolt lift. I wouldpurchasethis WeatherbyMark Vhttp://www.gunsamerica.com/guns/976500624.htmbefore I would purchasethis Vanguard Sub MOA http://www.gunsamerica.com/guns/976670007.htm. I own two Weatherby Mark V's, and three friends own six more together, and all shoot well under an inch. Good luck.