Originally Posted by Troutslayer
Prices vary wildly, what do I get for paying $100s more
The bushing sizing dies allow for better case life with minimal case neck distortion, giving longer case life. The expander button is not necessary during the sizing operation. The sized cases have less run-out in the neck area.
The micrometer-head seating dies are useful when adjusting the distance of the bullet off of the lands. If you're loading to magazine length, the micrometer feature has little utility outside of ease of use.
The other feature of the better seating dies is the alignment sleeve that locates the bullet while it's being seated. Redding has this feature in their micrometer-head seaters. The Forster seaters both have the sleeve, the sole difference being the micrometer. Hornady has a partial sleeve in all of their seating dies, making them my choice for pistol calibers.
The other deluxe feature of Redding and Forster dies is the in the finish, particularly their level of internal polish. Forster has the better designed locking ring.