I don't know that it's strength so much as it is some concept of how to hold the gun. It takes precious little strength to prevent a limp wrist.Whenever the issue of semi-auto reliability being related to user training, my thought is this:
To test your gun's reliability, you might consider handing it to the weakest newbie you can find. If the gun jams, limpwrists, or otherwise malfunctions with that person, maybe it will unexpectedly do the same in your hands?
Why should it malfunction in your hands, if you have the training and skill of a ninja seal wearing a walmart beret? Because if ever you were to be shot in a self-defense incident, maybe your typical target form, technique, and strength would be diminshed down to the level of a newbie
What say you?
I have held my Glocks as loose as I dare, just short of risking a tragedy due to losing control of muzzle direction, without inducing limp wristing. Just one finger around the grip, holding it just enough to point downrange. And that's with cheap weak bulk FMJ even
Something like this.
As long as you put some mass from your hand/arm behind the gun and high enough on the grip, it seems to be fine. Now, if you go full crazy like some guy on YT years ago and basically grab the gun from 90 degrees off to the side with only your thumb behind the gun, well, you need a nice big heavy steel frame to hope to get that to work