Check the listing for details. Index Bearing Block for Dillon Precision XL-650 Reloading Press. Condition: New. Listed at 15.60 USD. Index Bearing Block for Dillon XL-650 Replaces the steel rub block for smoother action with less drag and resistance. For the Dillon XL-650 progressive press. Align the block fore or aft to time the indexing of the shell plate. Barely snug the two mounting bolts so you can still slide the bearing block. Move your press gently to the priming seating position and visually check alignment. The primer seating stem should be up and centered in the shell plate slot. If it is not centered adjust the block fore or aft as needed then tighten the mounting bolts. NOT compatible with the XL-750 Please watch my youtube video for instructions. CNC made in the USA from billet 6061 aluminum. Anodized colors add durability, improve finish, and increase cost. Raw finish is unpolished and straight off the machine (will have machining tool marks).