I always prefer the Redding (The Competition, Bushing Nk, Micrometers, separate body die - the 3 die $$$ set). No exceptions. They are pricey and I'm not wealthy - but they afford me something others don't...the ability to control the volume of the case better. The 6.5 PRC is identical (almost) to the 6.5 Belfour Short Mag I do shoot. Hornady made Ed the form dies and a set of custom bushing/bump dies, and I really don't like to touch the bodies on wildcat cases that I have turned, reamed and fireformed in a VERY careful manner. For one, if you don't lube EVERY case the same, you will not get the same measurement from casehead to shldr. I've tested it literally hundreds of times. Anyway, I had just finished fireforming and was about to develop loads and I forgot the Hornady dies, while they are fine and I know they make good ammo, squeeze the body a bit, and I didn't want that. When they won't chamber anymore? The Hornady bushing sizer die is even better than the Redding body die, IMHO. So, what to do...
I'm staring at my Redding Creedmoor dies....and 7Mag dies......and it hits me, "The neck sizer bodies on these dies are identical....Why don't you just make a new inner sleeve that holds the bushing and stuff it in the Creedmoor neck die!" It worked, but please know that if you are going to do this (or have your gunsmith do it) make sure you minimize your set-ups and have a way to indicate it dead-nutz when you flip it in your lathe. I use a Tru-Bore chuck (thanks Nate!) and it's easier for me. Anyway, yes it works perfectly and does exactly what I want.
Bottom line for me, and why I told this story, is that I love Reddings and will do just about ANYthing to make sure I can neck size with them. My mind says, "Why sweat fireforming and mic'ing casenecks if you're just gonna squeeze the bejabbers out of 'em to something that is NOT the form of your exact chamber?"
Finally, this is also a "How long is a piece of string?" question. An ace reloader can make solid ammo with innumerable dies. You will learn what you like and don't like. But for me, I want max case volume and exact dimensions on my cases. It makes me feel better about my ammo, and really....? That's what matters. They are predictable for me, I've got tons of bushings, they're tough....and I get exactly what I pay for with every set. Buy once, cry once - actions, glass, dies.........Good luch and God bless!