KVW Unless theres a brand new RCBS X neck sizing die available you got some wrong info. The X die is a full length sizing die. Supposedly helps eliminate case growth
![chin :chin:](./images/smilies/chin.gif)
Only way I can figure to do that is to have an extra lip inside the neck of the die that would push back the case mouth when it got to a certain length. Not a situation conducive to top accuracy no matter what RCBS might claim. Almost seems like that would create a roll crimp before seating the bullet
The RCBS product site is down at this time so I could not check further into this die.
Forster and Hornady both offer shoulder bumping neck sizing dies now. Not entirely sure they're available in 204.
Did someone mention Redding? It seems vaguely familiar. If not here goes REDDING!!!!
Out of the box ready to go Redding is the one.
I just received some econo Hornady New Dimension Competition dies for my 6.5X284. Both the sizer and seater needed a little work before they were ready to load. With only 700-1000 rds of barrel life I did'nt want to spend a lot of cash on dies.
A Redding neck sizer ( or just about any die) will bump the shoulders if you stone down your shell holder
Mine does anyway. Takes a bit of stoning and checking but it does work. I haven't FL sized the 204 in years unless I'm switching brass amongst different barrels.