05-08-2020, 12:38 AM
Personally, I like Mandrel dies. I like running a bushing die for sizing, and then a mandrel die right before seating, to assure uniform neck internal dimensions. I used to use Lyman M-dies, which I sometimes still do, but have found their mandrals are a bit narrow in Diameter; and yield pretty tight neck tension, so have now switched to a Sinclair mandrel die for 6.5 use.