Competition dies are an expensive luxury that do not produce any better ammo then standard dies, they are just easier to use if you seek ultimate precision
What he says +1. In fact I found that I find a combination of bullet weight and seating depth that works and then lock-up the die tight, stick a paper label around ith, write on the bullet it is adjusted for and don't touch it.
That's the beauty of RCBS, Lyman, Redding lock rings. You can lock-up the die tight yet it will still screw in and out of your press. If I then want to set up another bullet weight I just buy another, on its own, seating die and set that up the same way.
For my .270 WCF I had two dies so set. A 140 grain and a 150 grain. For my .303 Enfield just one die set up that way as I only ever shot 174 grain FMJ.
You can't get that precision repeatability with Lee dies with their factory lock ring. Regardless of what the Lee "fan boys" will tell you their lock rings won't allow that method of reloading. That true benefit of being able to unscrew a die fully set up from the press and screw it back in with the seating and crimping (or not) remaining absolutely as last used.
If you do it that way you truly don't need micrometer dies. Also learn to read your die. How many turns, or part turns, of the seating plug alter the seating depth of that bullet. Again Lee dies that don't have a screw slot on the seating plug don't offer that visual check on if you've turned 1/8th turn or 1/4th turn and so on.
I like Lee Factory Crimp dies but I don't rate their rifle loading dies at all because of this little benefits that RCBS, Lyman and Redding have by the nature of their lock ring and seater plug set up. If you do get them chuck the lock rings away and get third party lock rings that have a screw to tighten them around the die.
And I don't like Hornady's version of Forster/Bonanza dies with the drop down sleeve either. It's a bloody PITA!