I have now graduated from the .45 colt to the .270 winchester in my reloading projects. Problem is when I size the cases the shoulders are getting dimples. They look like wrinkles right on the edge of the shoulder. What am I doing wrong?

Too much lube. A little goes a long way, so use it sparingly.

As above and make sure the vent hole on your die is clear.

Get some BARDHAL.It works. roger