MTM's shotshell trays hold 50 rounds each and are perfect for storing reloads. Built durable and stackable, they make for a good space saver in your reloading area.Shotshell Tray that hold 50 each. They are perfect for storing reloads and convenient in the duck blind. Built durable and are stackable. They make for a good space saver in your reloading area. They are the trays that fit into the SD-100, AC50C and many other MTM cases. They also fit in the discontinued S-100 and SF-100's. They are not designed for the SH-100 and SF100D, but will fit in there.