The 57 is a completely different rifle from the 36 that Dave spoke about. I do not own a 57 but I have handled them, shot them and know a couple of people who have them and they are completely satisfied with them. Yes, they do shoot as well as advertised, if the shooter is capable of it. I do have a couple of centerfire Coopers and personally I cannot imagine a better rifle for the dollars.
There were a lot of problems at Cooper for a few years and there was some poor quality control. The problems involved what would basically be called a "hostile takeover" but Cooper is back in charge, and has been for the last few years, and things are turned around.
With all of that being said - if you are thinking of the 36 as a silhouette rifle I would not recommend it. Go ahead and get an Anschtz, that is what you will end up with eventually if you want to be competitive.