Hi archimedes1967;
Welcome to the forum. Thanks for the tip.
Since I had purchase a 25 lb container of Purified Salt (which is actually also called Pickling salt), I haven't purchase any in a long time. The last time I checked in my area, pickling salt is generally the same price as kosher or table salt, per weight. So for me, having both is more convenient.
Both pickling and kosher salts are purified salts, so if pickling salt is not convenient, then measuring kosher salt by weight and processing it would make a good pickling salt substitute. The reason most brines call for pickling salt, is because the smaller grains dissolve easier in cold water.