The same problems in adjusting 7/8-14 sizing dies can be found on larger dies for sizing "big boy" cartridges that require 1 1/2"-12 dies. The PMA Micro Die Adjuster addresses these problems and replaces the lock ring on sizing dies with a micro-adjustable lock ring. Laser engraved markings are in increments of .001" and can easily be split for .0005" adjustment.
Works for dies with 1 1/2" - 12 threads. 50 BMG dies made by RCBS, Hornady and others.
*Does not work on Lee 50BMG dies*