This is a pic of my 460 Rowland... You can get the Glock 30 Rowland kit from
http://shop.460rowland.com/conversion_kits
They have better pics...
Still in all seriousness I think you would love it and you can get ammo from underwood ammo running at mid 44 magnum power with 185/230 grain gold dots.
The energy dump graph at the end of this youtube video says it all:
http://www.youtube.com/watch?v=OecVBzPYnfc