I think he dropped some zeros. 0.0005" or less and 0.0006-0.0010".
…Also, have you disassembled your seating die and cleaned the factory oil out? If found that made a difference. I used mineral spirits with 10% ATF. You may recall from ancient history that sperm whale oil is a traditional watch lubricant because it is thin and doesn't gum up. The first automatic transmissions were invented in the 30's and used sperm whale oil for the same reason. So ATF is a sperm whale oil substitute and its is pretty immune to any kind of thickening or gumming over a wide range of temperatures.
One trick you can play with your Dillon press is one that John Feamster recommended with a Rock Chucker he was using (IIRC). He put a rubber O-ring between the die lock nut and the press. This allowed a little extra wiggle for self-centering (a Lee lock ring not tightened too much will do the same thing). I have tried it with limited success. I found I had to lube the die threads and press threads for it to have much real effect.
One more thing to check is the runout of your case heads. If your rifle bolt face or your chamber aren't perfectly square to or coaxial with the bore axis, respectively, your case heads can be fireformed slightly out of square and not push into the dies quite square.
Finally, you can adjust your finished rounds. NECO sells
a nice tool for this, but all you really need is a piece of hardwood with a bullet-sized hole drilled into it. You put the bullet end of the cartridge in and, with practice, learn how hard to push to correct the error. You then retest for this on your runout gauge.