Large Yaw is Not OK.

I've read opinions that short-range bullets which hit a target sideways,
or at some large angle, are not such a bad thing in personal defense.
But while a jacketed bullet can do more damage if it turns in soft tissues,
bullets that must pass through glass, bone, or leather before reaching soft tissue
should be close to nose-forward until that time. This is even more important
for a bullet intended to expand or fragment in soft tissue.

Testing indicates that a 32acp fired from a 2.8" barrel (2.1" rifled length)
will arrive nose first, then tumble in soft tissue, ending up pointed toward
the gun. The center of mass is a bit behind the center of pressure during flight,
but spin prevents tumbling. When spin fades, the center of mass can then
turn forward, reversing bullet direction at the end of penetration.

This path of a stable 32acp (fmj) is as effective as some expanding designs,
even moreso if there are barriers prior to entry into soft tissue.
Also, since the air drag on a small stable bullet is low, and the small nose
concentrates its energy, penetration tends to be better than expected.
(This is consistent with a ballistic armor display indicating that energetic,
wide, and blunt pistol bullets do not penetrate as much as would be expected.)

Concealed guns are very limited by their short barrels, starting with
reduced muzzle velocity. If the rifling twist it too high, energy and
initial stability are reduced, with more yaw at the muzzle, then
possibly serious aerodynamic effects on a wobbling overspun bullet.

But if the barrel twist is too low, the tendency of the center of pressure to
overcome the center of mass increases, and non symmetric forces are not
properly cancelled by spin. (Rifle bullets at long ranges are a wider story,
particularly because vertical drop is very important.)

When a flat-tail bullet separates from a barrel, it gets an unsupported final push
from the powder explosion, likely adding a bit to existing yaw.
It's normal for a bullet from a short barrel to have yaw up to 4 degrees at that point,
which grows if there is aerodynamic instability. To control this, I "gather" that pistol
barrel twist should be between 1-in-12 and 1-in-16, with rifled length 6 times bullet diameter.
(Subtract case length from the breachface-to-muzzle length to get the "rifled length".)

Some popular pistols do not meet these parameters, and I would not trust them
unless there was good evidence that the bullets traveled nearly nose-first to target.
You can check for excess yaw/wobble by firing into heavy cardboard or
light-color foam slabs at 5 to 10 yards. There will be a faint gray smudge
on the cardboard/foam (powder residue); this smudge should be fairly round.
If you can arrange it, use a piece of soft wood for the target, to check for yaw and penetration.
.