Its hard to see in the photo, but after boring to size, I set the compound to cut a 5 degree lead-in taper about .075" deep. This allows the case mouths to easily enter the bushing. Then it was chamfered and polished. The sizing portion is only. 500" deep. The remainder is larger to allow the PP bullet to move freely.
I've used the Lee push through sizers for other cartridges. They work well too.