I'll be honest with you, I have no idea why Ruger put a CP at the end of that catalog number.
Here's a pic of the gun...
http://www.ruger.com/products/1022Target/specSheets/1262.html
"CP" to me would mean the gun is a compact and it has a Zytel stock. But this gun obviously has neither. wonder of somebody at Ruger goofed when they gave this one a catalog number??
Chet15