Only a solid in the 9.3 will penetrate as well as a hardened .73 cal ball, DP. There is no soft point what will do what the large round ball will do. Of course if we consider most people hung on a mere 2 3/4 drams (75gr.) of powder, about any modern gun will give as good penetration.
As to the l36 maxiball - I finished a deer with one. Hunting with my wife - shot a buck in the throat (facing me at only 50 yards or so) and my .45 cal. ball struck about 1" to the right of my point of aim. The deer dropped as if polaxed, but thrashed about. I ran up to the deer to administer the cou-de-gras with the quickly re-loaded .45, stopped about 10 yards away and missed his head as he thrashed. I was going to jump on him (Hey- I was young, strong and full of gumby-ness) and finish him with my knife, but instead asked Tracy for her little .36 - loaded at that time with a 128gr. maxiball. I shot the buck in the neck, about 1/2 way down almost perfectly broadside. The maxi hit the spine, turned about 75 degrees and skidded down the spine to stop right between the shoulder blades, resting against the spine. A number of bony projections were clipped off the spine. This shot stunned him so I slashed his throat open with my rather large bowie, then proceeded to gut him outa nd find what the ball and bullet had done. The ballmissed the spine by about 1/2", travelled front to back of the necka nd exited. The maxi, I've already explained. There was about 24" of penetration from the maxi which showed the collapsed nature of this projectile on the 'meat' side, while the bone side was scrubbed. It had stopped spinning upon impact with the spine, whence it turned instead of going through the spine. Lousey bullet!
I should have learned from this experience about maxi's, but wasn't until years later, found them to do the same thing on moose - rarely ever going in a straight line- tunrning this way and that whenever they hit something hard- bone, cartilege, clenched muscle - all turn maxiballs.