I think what jacob might be referring to is the fact Hornady sells a neck sizing die that functions on multiple calibers. They have two 22 caliber neck sizing dies, a short and a standard.
The standard die will resize 22/250 and the .223 Remington. Short of looking at their chart I think it also does the .222 Remington and the .222 Remington Mag.
As far as I know, they are the only ones who do this this.