Lee - 7mm PRC Collet Die Dry Lube A ZeroLock mechanism allows you

A ZeroLock mechanism allows you to set a limit for elevation after zeroing your riflescope at a preferred shooting distance

see BT1517) to attach this rail to the forearm of standard rifle stocks

Chamber your own micrometer seater to your wildcat cartridge or chamber reamer

Look out for this packaging on your local gun shop shelves

Lee - 7mm PRC Collet Die Dry Lube A ZeroLock mechanism allows youThere is no loading system that will load more accurate ammunition than Lee Collet Dies. A collet squeezes the case neck against a precision mandrel for a perfect bullet fit with minimun run out. No case lube is needed. Cases last ten times longer, so the savings on only 35 cases will pay for the dies. Maximum accuracy is usually achieved by seating the bullet out for enough to touch or almost touch the rifling. This provides the shot start pressure