Wow that 220 is impressive! That's like cheating! I just did some looking around the internet and saw someone claiming to have shot a 3/4" group at 100yrds with pics. First time I've ever seen a Leupold rifle scope on a shotgun. Pretty cool stuff

Edit: According to the Savage website, the MSRP is $565. This is probably much cheaper than what you would spend on parts and everything to try and put one together on your own.