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MEC Resize Rings are located on the depriming stations for the MEC 600 Jr. reloaders. For reloaders who spend a lot of time reloading these rings wear down and break. In addition there are times when the rings do not completely resize hulls to the appropriate specs. In these conditions having extra rings on hand makes perfect sense.
To ensure optimal resizing performance the manufacturer recommends these rings be replaced occasionally based on the volume of reloading done. If resizing hulls becomes an issue the MEC Supersizer might be an alternative solution.
