So was starting to make test loads for my SAC 6x47 and hit a road block. So brass was purchased lapua once fired 6.5x47 brass. I ran them thru 6x47 Forster BR die, uniformed case length and ran 6mm Sinclair NT mandrel thru all of them (.241 mandrel). Hicup come when seating 108 eldm, Forster BR seater is leaving a nasty ring. No excessive force required or anything and I know neck tension is not an issue. Thinking seating stem is just out of spec for the 108s. Any help would be appreciated, I need to get shooting !!!