Use of Expanding Bullets in Small Defensive Cartridges
This is a great article on pocket guns.
I have used Ball and HP in out PA 63.
Just messing with some old building materials I was amazed that ball went through 11 layers of 1/2 inch drywall.
On the pocket guns i have always felt mixing every other round was a good idea. Ball/ HP reason being HP may not penetrate deep enough to do its job.
Just some things to think on.