Never used the Redding, but over the years, I've loaded many rounds for the .408 based cartridges with the RCBS Ammo Master II press. In the early years, I would use the press to seat bullets as well, but have since switched to seating with an arbor press. My bid goes to the RCBS...
It is what press looks good to you. I have a rcbs rockchucker and it is 30 yrs old. still works well for what i do. My next press will be a Lee because of the money. Good luck on pistol components.