One shot doesn't work as well as advertised. Hornady does make a wax called Unique. It is applied by your finger and will not dent a cartridge. Unique wax lasts a long time, so much so, I 'm still on my first container after six years and over 2,000 applications of .303, .270 Win., and 30.06 and haven't used half of it yet. (I count apps. by the bricks of primers used.) If I finish the wax cup before I die(I'm turning 70 next week, I'll let t.h.r. how many shells it does.