Incremental improvements to reloading techniques and tools help to save time and gain consistency in precision hand loaded ammunition. One of the recent additions to the 6.5 Guys’ reloading benches is the use of Sinclair Generation II Expander Mandrel Dies. The mandrel die helps to minimize overworking the brass in the neck during the case resizing operation and provides a very uniform neck tension prior to bullet seating. In this gear update episode Steve and Ed briefly discuss this new piece of reloading gear. For more information go to the Sinclair website: http://www.sinclairintl.com/reloading-equipment/case-preparation/neck-turning/turning-expander-mandrels/sinclair-generation-ii-expander-dies-prod38807.aspx
Different sizes of mandrels are available (.001″ and .002 under caliber size). These allow you to control neck tension in addition to the other benefits you will experience using a mandrel. Most expander balls are .001″ under caliber size so if you decide to go with the .002 under mandrel you may need to drop your busing size down by .001″.