50 years ago we bought the first sets of dies. They were mostly Herter's. One was a C-H set and one was a Pacific Set. Since then, most have been RCBS, one was a Lyman and two were Redding. One Herter sizing die was oversized and got replaced with an RCBS sizing die. One Redding die was returned and replaced - no charge. Redding also hand-polished a seating stem for each set, as they were leaving a ring around my cast bullets, also no charge. The others might, Redding did; I will buy Redding in the future. Their techs return your emails timely and, I believe, they go the extra mile for your satisfaction. That is worth a lot to me. Definitely not cheap, but for me they are worth every penny.
Regards,
Sweetwater