I've been shooting one for around fifteen years. The year brass for the 204 came out I built a 25-204 to duplicate the 257 Kimber(25-222 Rem Mag Improved) 100gr partitions at 2850 fps using off the shelf dies and no fire-forming, it worked so well I had a 22-204 Reamer made and built it, it is one of my favorite pelt hunting rounds with a 40gr NBT at just a hair under 4000fps.
I get all the same questions and you have to think of a 22-204 as a 222 Rem Mag Improved 30 degree w/no fire-forming.
Being enamored with the 204 case I built a 6mm-204 and use it for a platform to shoot Lead Frees at coyotes.
22-204 at work
