Quality Made Except 1 Issue
These case checkers work as advertised....almost always.  I ran through 200 cases and 30 did not pass case check.  almost all of the brass was made by R&P that failed.  Some R&P passed.  Curious, I looked into this into further detail.  The case checker inside diameter is not 0.380 per the SAAMI spec for 357 Mag but 0.377.  The paperwork from the manufacturer stated that there is a 2mil tolerance with their case checker dimensions which is not mention in the description.  Overall I am satisfied with the product. I checked the 38 Special and it had the same issue.
Rating: 4 stars