The properly adjusted die should "bump" the shoulder by 0.001 to no more than 0.002.
Die instructions are for making it "functional" more than "proper".
If you're getting the same exact measurement and the case is longer, it MUST be working the shoulder, or it'd end up longer like the rest of the case.
In other words, it seems likely that you want the die 0.001 lower in the press.
That's only 1/71th of a turn.
Before you adjust, run a case that measures 21 through and see if you get 25 after sizing, I bet you do.