Get one of these and don't look back. Once you get it mounted, sighted in, and Chronied... go to their Ballistic Calculator, and then get ALL YOUR DROPS and WINDAGE for all those little lines and dashes. You can use this BDC Reticle or turn the turrets. With a 204, windage and drop will always be a factor... so you might as well get a scope that gives you MAXIMUM POTENTIAL.
http://www.vortexoptics.com/content/lrbc
Vortex Viper HS Long Range Rifle Scope 30mm Tube 6-24x 50mm Side Focus First Focal XLR Reticle Matte