The MEC 600 Jr. Mark 5 Reloader is an example of the high-quality products manufactured by MEC. This single-stage reloader has been perfectly engineered and offers a simple and flawless operation. One advantage of using this particular reloader is its speed, loading between four and six boxes an hour. If preferred, this reloader can be upgraded, which eliminates handling every primer individually. This is the ideal reloading choice for 3-inch shells and works for a variety of calibers, including .10, .12, .16, .20, and .28, although it also accommodates the .410 Bore.