First thing I'd do is put some Flitz polish on a bore mop that fits tight in the die and run it in and out with a cordless drill for about 20-25 seconds. You really can't hurt the thing with Flitz and it will give it a mirror finish. If there are gouges/grooves it won't help them but otherwise it will give a smooth surface for the lube to work better.
You can easily tell if the die is made wrong. Measure one of the sized cases and see if it meets SAAMI spec.
Also, see if your chamber is over-sized by measuring the fired brass against the SAAMI chamber standard.
Both standards are
here.