The Lyman 50 BMG Accu Trimmer with Pilot is one of the most powerful yet reasonably priced 50 BMG case trimmers on the market. This trimmer was designed specifically with 50 BMG enthusiasts in mind, built to ensure that you need only buy one trimmer, no adapters or additional accessories required. This Lyman 50 BMG Accu Trimmer with Pilot is just what you need to perfectly align and trim your 50 BMG cases. Simply slip the shell head into the Special holder to center it perfectly with the cutting shaft to ensure quick and easy trimming. It is as easy as that!