I used to Neck Size only. However, like many I have found that the brass gets too tight in the chamber and that changes the dynamics of the load.
Now I prefer to size the neck with a bushing and no expander ball and size the body. Currently I run redding body dies with RCBS or Forster bushing dies. It takes a little longer this way but it allows me to control the shoulder bump better. I bump .002.
This method has allowed me to chamber the loaded rounds smooth and effortlessly and seems to help with brass life.
The only thing I don't know about is accuracy. I am not sure if this is the best method for accurate loads. All my rifles seems to shoot fine, .5 MOA or less.