Brushy, 150 yards is actually pushing the limits of the .44mag to the extremes. 200 yards is really out of the question. If I were you, I'd look into a 2-7x Nikon Prostaff. Around 150 bucks and a great little scope for the money. It has the Nikoplex RET rather than all that BDC jazz.
http://www.opticsplanet.com/nikon-pr...x-reticle.html