The Expand Mandrel Window Riser is a simple device that brings the case neck expanding above the press and allows for full visual of the operation through a viewing window. Not only does it bring the case neck expanding operation from below the pres where line of sight is difficult but it also eliminates the need for the stop screw in the expand mandrel. Patent Pending

Thread the Expand Mandrel Window Riser into the top of your loading press, then thread the expand iron complete into the top of the window riser and adjust each so you can stroke out the press completely without driving the case mouth into the press adapter. This allows you to view the operation which is typically blind under the press and also eliminates the need for the stop screw in the expand mandrel.