As referenced last week, I've spent some time vetting ammo choices for toting and home defense in a 9mm.
As part of the process, I've devoted a good deal of time watching ammo performance reviews, especially gelatin block test firings, on YouTube.
Based on the reviews, two of the best performers in 9mm short barrel pistols appear to be Speer Gold Dot and Federal HST varieties.
Good luck finding 9mm Gold Dot or HST. It's way scarce except at vendors who've apparently hiked pricing to keep all but the most motivated buyers away.
There's something else I've noticed. While +P and non +P 9mm hollow points seem to work acceptably well in guns with 4 inch or longer barrels, non +P jacketed hollow point ammo is far more likely to suffer expansion failure when shot from a 3-inch barrel and then passes through denim on the way into gel. And failure to expand often leads to drastic over-penetration.
Those who pack non +P rounds, thinking less power means less penetration risk, may want to rethink their ammo choices. Especially when carried in one of today's smallish carry guns.