If you ordered the "Hornady Custom Grade New Dimension Dies", you should be reciving a "Full Length Die Set".My "Hornady 2005 Catalog" does not show a Neck Sizer comes with the die set. You can Neck Size with your Full Length Sizer if you adjustit right, but using the Neck Sizer is easer.You can purchase a Hornady "Dimension Neck Size Die for the .300 Win. Mag. (Item No. 044045) for $20.48 each. Go to www.hornady.com or call 1-800-338-3220 for more info.

NOTE:

Any Full-Length resizing die will Neck-Size if you set it back about .060 of an inch from touching the shell holder with the press in the full "UP" position. (I have never used these instructions; I have always purchased Neck Sizing Dies).

Good luck.