Here's what I would do. Get several different ammos, five or six. Vary the weights and bullet styles. I wouldn't mess with anything +P; it's not necessary.

Since my shooting skills are about average, I would shoot several ten-shot groups at 25 yards offhand, paying attention to cartridge feeding reliability, point of bullet impact vs. point of aim, recoil, and accuracy. When an ammo displays all four factors to my liking, I know what's best for me and my pistol.

Granted, it's more trouble and expense doing things the right way, but it needn't be done but once and there will be no doubt as to choice. An ammo that you can shoot well is of far more worth than jello and water jug penetrations or other "tests" that are great for initiating armchair and keyboard discussions that are all but worthless.