Wrinkles or waves/dents? The latter can be caused by too much lube on the case.
The idea is to size fully, but minimally. Start with the die backed out, and going in in small increments until the bolt just closes smoothly on a sized piece of brass. This way you get smooth chambering without excessively cold working the metal.
Try a search on setting up sizing dies in the reloading section. Search on this topic and "mathman" if you're so inclined.
