From the link I posted a couple of years ago. When the tally is complete there doesn't appear to be much of a difference!!

.380 ACP
# of people shot - 85
# of hits - 150
% of hits that were fatal - 29%
Average number of rounds until incapacitation - 1.76
% of people who were not incapacitated - 16%
One-shot-stop % - 44%
Accuracy (head and torso hits) - 76%
% actually incapacitated by one shot (torso or head hit) - 62%


.38 Special
# of people shot - 199
# of hits - 373
% of hits that were fatal - 29%
Average number of rounds until incapacitation - 1.87
% of people who were not incapacitated - 17%
One-shot-stop % - 39%
Accuracy (head and torso hits) - 76%
% actually incapacitated by one shot (torso or head hit) - 55%


OF COURSE, IN SOME AREAS YOU CAN'T BEAT A SIMPLE TWENTY-TWO:

.22 (short, long and long rifle)
# of people shot - 154
# of hits - 213
% of hits that were fatal - 34%
Average number of rounds until incapacitation - 1.38
% of people who were not incapacitated - 31%
One-shot-stop % - 31%
Accuracy (head and torso hits) - 76%
% actually incapacitated by one shot (torso or head hit) - 60%