I just noticed a Hornady add for their new GMX mono bullet made entirely of gilding metal - "the same alloy used to make Hornady bullet jackets for decades". And their banding is even wider and fewer than those on the Barnes bullets.
The grroves are way up from the base of the bullet with a long ungrooved portion at the tail of the bullet - I would say more than half of the bearing surface of the bullet is at the rear - nonbanded portion. Does this make any sense at all? I see the need to have the base of the bullet full diameter for a decent extent to prevent pushing the last band forward on the bullet when fired, but this looks excessive.

BTW, I do have a CNC lathe if anybody here has a mono design which they would like to try, send me a PM. Heck, with the green meanies breathing down our necks, maybe there will be a future making monos custom sized in a design specifically for double shooters.