Here's my little no-chamfer socket set. With a modified ratchet.
The problem is that the chamfer was designed to help slide the socket over the fastener if it wasn't perfectly lined up. But on thin or soft nuts, the chamfer (which is actually missing metal) means that there's very little "meat" of the broaching contacting the fastener. If it's thin and soft, it just rounds out. Getting rid of the chamfer allows a significant increase in socket to fastener contact.
I originally made 3 SAE sizes (9/16", 5/8", and 11/16"), and they worked so well I made another set for a buddy. (He likes them as well).
Then I started running into metric thin nuts, and made a couple of the sockets in metric (with the blue band). 15 and 16mm.
Don't use them everyday, but when I need em, they work.