Re: Need some advice on a seating die
The Redding Competition seater (the one with the micrometer top) is a copy of the Forster Ultra-benchrest, made after Forster's patent expired. The Forster Benchrest is the same design, just without the micrometer. The micrometer adds nothing to the ability of the die to seat straight and consistent OALs, but it is handy for dialing in the OAL. The Forster Benchrest is notably less expensive than the Ultra Benchrest, and both are much less expensive than the Redding Competition seater.
The Benchrest is certainly worth the extra cost over conventional seating dies, in terms of consistently low run-out.
If you need or want to crimp rifle cartridges, there is no better crimp die than the Lee collet style FCD for rifle cartridges.