Switch to a Forster Ultra Micrometer seater; the standard stem will work with almost any bullet on the market, and the micrometer top makes seating depth adjustments easy. The metallurgy and shape of the stem spreads the contact area to minimize bullet deformation. The sliding sleeve (similar to a chamber) locates the case properly before the bullet enters the neck which reduces runout.
Something in your loading process is making your bullet seating force very high to get the sort of swaging your loads show. What is the difference between the sized and loaded OD of your brass? If it's more than a few thousandths of an inch, you may want to use a mandrel to set a more appropriate diameter. Do you use a dry lube on the necks? Is the as-fired coating left in the necks, or is the brass sparkling clean?