The woman in question never posted. Let's draw up a hypo that will get folks to fight with each other, about someone that isn't even present.
HD handgun for a petite woman?
Ok, here's the deal. This woman's husband passed away and she wants something to protect herself (I was very happy to hear this). Ultimately I would suggest a shotgun, but she feels that long guns are too unwieldy and that it could be taken away during a conflict. So that leaves us with a handgun.
I really would like to see her choose a revolver, but I think .38/.357 would be too much for her. I know ruger makes a gp100 in .32 H&R mag, but I'll bet the gp is too big for her small hands and I don't know about the recoil. I think the lady smith line from smith and wesson would work well, but not in .38/.357. Any suggestions for a small gripped gun that is fairly light and doesn't have much recoil?
I was also thinking maybe glock 9mm? semi auto to soak up a little recoil and no safeties to fumble with. The concern is the glock's blocky grip. The other thing is that I'm not sure about 9mm recoil, she's never shot one so I'm not sure that she could handle it. Sounds like a range trip is in order.
Yes, take the person to the range, give them a bunch of guns and loads, and let them draw their own conclusions, and, ask THEIR OWN QUESTIONS.
To be specific, the Glock 26 is an excellent choice, if you can hold on. 10 rounds, and, with 125 grain hot loads averages around 1200 fps. Excellent 27 you might look at with 135 and 155 grain bullets. Over 170 grains, and things start recoiling and moving too slow. You might also let her try the 45ACP Glock 30 and 36. Of all the Glocks, the 36 has the smallest grip that I know of. The 30 is very accurate, and, if you use light bullet loads, the recoil is light, since it operates at 13k-17k pressure, vs. the .40's 35k pressure. As the person develops, they can move to heavier bullets.
And, when all is said and done, don't forget to let her try as light a caliber as she wants, like .32 and .380, because with solids, they will penetrate enough.
Final bit of food for thought on S&W J frames. They are REALLY hard to shoot, double action, at least for me. Trigger has to be over 12 pounds on my 360PD, and, the front site moves all over the target as I draw the trigger. YMMV depending on hand size, but, they are NOT easy guns to hit stuff with, DA. Making sure the hands match the grips is vital. Also, if she can carry a 3-4" barrel, in both revolver or auto, the ballistic benefits are worth it. BIG difference in velocity between 2" and 3" barrels. Model 60 S&W comes to mind.
Also, remember that often the flashbang from a snubby can be more effective then the bullet.
Now, is this a CCW gun, or, a home defense gun? Can she get a CCW in her area or not? What is the biggest gun she feels comfortable carrying weight wise, and size wise?