The Bullet Seating Stem is designed to fit Hornady Custom Grade Dies, and is machined to fit the profile of specific bullets to seat them as precisely as possible without damaging bullets. (Not compatible with other manufacturers' dies).
Specifications:

Type
Caliber	338 Cal
Die Type	Seating
Die Series	1
In Set	300 gr
Metal Type
Adapt to Mfg	A-Tip Match Bullets
Shell Holder Cap
Shell Holder Cap