i am using a *Lee Collet Neck Sizer Die* for my 204. it sizes only the neck and i get very, very, little bullet run out on the finished rounds. do not need any lube on the brass either.
i have 8 or so reloads on some of my hornady brass and no problems at all with the brass.
http://www.midwayusa.com/product/835972/lee-collet-2-die-neck-sizer-set-204-ruger