Redding is good stuff but I have a buddy who has a big boss that now sits idle in deference to his co-ax. He deprimes on the Redding and that’s about it. The Dillon I will say is not overpriced. I have two. The reason I have two is that my first was given to me by and uncle. He bought it second hand. I’ve no idea how old it is. I ran it for pistol loads. When the powder measure finally broke I called Dillon to purchase a replacement. They sent me one at no charge, even though I was at least the third owner, which I disclosed to them. That is why they are worth the money and why I would recommend them. It sat in a humid closet at my parents house while I was in grad school and the ram rusted. I paid I think $95 dollars for Dillon to rebuild it, which covered the return shipping also, and the only thing I got back that was original was the frame and handle. Everything else was brand new. Buy once, cry once. You may very well get the same service from Redding but I can’t speak from personal experience.
As to the inferiority of the Dillon for precision work, you are speculating. That’s not meant to be offensive. There no head to head data on this superiority of which you speak. I have a Forster as well BTW and use it for my “precision” stuff just because I like it and it’s how I learned reloading for rifle. No other reason. If you’re a better shooter than a guy like say, David Tubb, who isn’t limited by using a Dillon, then I stand corrected. However, you’re probably limited by time and financial resources like the rest of us mortals, even if your talent is sufficient. Do you neck turn, do you sort your pills for weight and bearing surface, do you uniform your primer pockets, how often do you anneal? How small a group can you shoot. Are you in the 0’s? Unless you are shooting a heavy bench gun off a $1k rest and are a GOOD player of that game, you will NEVER see the consistent difference in your results from the factors you’re speculating over.
Here’s my best group from a 6 Creedmoor I built my wife. About .08” MOA. I always whip this one out. It was shot off a bipod and rear bag from a bench with factory Hornady 108 ELD match. The gun is an incredibly easy sub quarter minute shooter, all day. It’s like they just fall into a ragged hole. Do you suppose that ammo is loaded on a single stage press?
You have gotten some good advice and of course it’s your money, but a wise man doesn’t disregard good council. My advice is always be listening, always be learning. People here share their experience because they want to help you.