These are lightly-loaded rounds for persons who have some physical disability that prevents them from dealing with the recoil of full power ammunition. They're certainly better than the .22 rimfire option some people recommend, but I hardly would call them "ultimate" anything - in fact, they seem to be just a relabeling of the old mid-range .38 special target load. (MAYBE they added a few tenths of a grain of powder to bring them up to standard pressures.)
"Atomic Ammunition" catalogs a 148 grain +P lead hollow point which is basically a hollow base wadcutter loaded backwards - with higher velocity and that huge hollow point, I would expect the terminal effect to be better than the Georgia Arms offering. Buffalo Bore also makes a 150 grain "standard pressure" hard full wadcutter which would probably outperform the GA load.
I have loaded reversed HBWCs which will outperform most factory loads, but nowadays factory ammo has advanced to the point where IMHO premium loads from major manufacturers are good choices for personal defense. YMMV, but with the possible exception of Buffalo Bore, I don't have a good feeling about the aforementioned ammo makers. I generally buy premium loads from Remington, Speer, Federal, and Winchester for my defensive ammo - there are a few other brands I might consider.