I took the Holland 500/450 to the range this weekend and I'm very pleased with the way it shoots.

With R-15, it shoots Hornady 300gr hollow points, Hornady 350gr round nose and Woodleigh 480gr softs to the same point of aim at 50yds.

I find it interesting that some think the 500/450s are less desireable than comparable 500/465s. In reality, you have far more bullet options with the 450.
Based on this one selling for $58,000 maybe people are finally seeing the light of day. I'm glad I got this one before anyone else learns it

http://213.219.62.57/asp/fullCatalogue.asp?salelot=1019++++1210+&refno=+++17864&saletype=