I caught Dad setting up to load 45 Colt from the "Ruger Blackhawk/Redhawk Only" section. The only thing he has chambered in 45 Colt is a Peacemaker clone. Yikes.
Dad knows how critical it is to be careful with powder measuring and such. Unfortunately small details make him crazy so he also has a habit of not paying close attention to incidentals. He's also a form-over-function type. Never mind double-checking settings, confirming measurements, or reading notes for warnings and specs. As long as it looks good it fine. It never occurred to him to read beyond the cartridge name and the powder weight for his bullet selection. Not even the BOLD RED DISCLAIMER at the top of the page.
It's gotten him in a bind on many occasions. We've learned through experience not to let him navigate on family trips unless we have a lot of extra time. Hand him a map and he'll know where we are and where we want to be, but all those little squiggly bits in between might as well be Hamlet in hieroglyphics. We have discovered lots of new out-of-the way places, though.
Brad