If there are scratches on the brass, it is requiring too much force to close the bolt. The excessive force upon bolt closing is putting excessive wear on the bolt lugs and often is not as accurate. Use a Redding body die, it will bump the shoulder and size the body, but do it just enough so that the bolt closes without force, not loose but snug, but never tight. NEVER use a full length die, they over work the brass and can even cause the brass the be crooked. When the ball expander is being withdrawn from the case through the neck, we often encounter a lot of resistance, that resistance can stretch and pull the neck portion of the brass case to one side. A LEE collet die is the way to go, yah ayh I know, LEE make cheap stuff. Well they make excellent products that are less expensive, how's that, totally different now, right. One of my best friends uses the collet die with his Remington XR-100 in .223 Rem, at 200 yards, not 100, but 200 yards, five shots under .500" c to c with 4 shots in a small cluster under .200" at that range and often, not just occasionally. The LEE Collet die only works the neck portion of the brass case once per sizing and when the bolt is too difficult to close, we bump the case with the body die. A combination my friends and I have used for decades now and we are having great success and accuracy as well. My Tikka T3 Sporter, same load, 3 different seating depths, all cases sized with the collet die and crimped with the LEE factory crimp die, just a kiss to create a constant pressure curve upon ignition, Hornady 168gr HPBT Match, in all 9 groups of 5 shots each, average for all 9 groups at 100 yards, with the three flyers I called, I pulled the shots, .563" c to c. The LEE Redding combo works and your brass will last longer. Enjoy. Dave & The Girls