Around and Around They Go: Tumblers for Handloading
When I began reloading in 1976, my department used .38 Special/.357 Magnum revolvers. Naturally, this was the first cartridge I reloaded. After a few hundred rounds, I started seeing scratch marks on my cases. I sent the die to RCBS, which sent a replacement die with a note asking how long I tumbled my brass to get them clean before resizing them.