Someone mentioned a Judge .45/.410, and ultimately that's what I will carry around the farm and out in the woods, so a magnet will work for it. I work for Mossy Oak Properties dealing with farms and hunting land so I am oftentimes out of the truck walking around different properties and want to have protection from typical Arkansas critters in the spring and summer. The Glock is my concealed choice, and I carry it at 5 o'clock because I am right handed and it fits well back there, but I wouldn't need to keep it there while riding around in the truck or Honda though, just somewhere easily accessible.
Does anyone use the magnets for revolver-type weapons? Not as much flat surface to stick to on them.