I found my CR type was consistantly more accurate than the CRP types. What's more its deviation range was less than that of the room full of CRPs.
A slight caveat though. There are one or two slight shortcuts/assumptions used with the CR type, as long as you choose not to use the shortcuts/assumptions then the answer was accurate enough. My CR is the smallest availabe (a CR5) so is the least accurate.
hmmm.....how many guys would admit to having the smallest? 
[This message has been edited by Tinstaafl (edited 25 June 2000).]