If you can ever find it in stock anywhere WC844 or WC846, I have or had 16 pounds of each and used both successfully in .223. One does better with heavier bullets other with lighter but forget which is which and not at home so I cannot check.
Here is a good thread talking about them: http://www.thehighroad.org/showthread.php?t=608551
Here is a good thread talking about them: http://www.thehighroad.org/showthread.php?t=608551