The Beretta PX4 .40 cal has a problem with trigger sting according to some. I have a PX4 in 9mm and have never experienced trigger sting.

The following is from Beretta's website:

"Trigger sting or trigger slap is a phenomena that may affect virtually any firearm given the right set of circumstances: fit of the firearm to the shooter's hand; physical characteristics of the shooter's hand; how a particular shooter holds the firearm and how that affects harmonic vibrations; and a phenomena, documented by high speed photography, referred to as a secondary trigger pull; and timing; all enter into the equation.

We have done extensive testing on pistols, for example, including where a particular pistol documented as causing one particular shooter "trigger sting", has been fired under the same controlled circumstances by other shooters. These other shooters did not suffer this phenomena.

A Google search of "trigger slap" and similar terms will bring to light that this is common phenomena that affects, as indicated, virtually any firearm given the right set of circumstances. And there are just as many theories as to how to "cure" the phenomena. "

I will give the trigger slap some investigation. Thanks. The pinch I feel is not every round being fired, but that could be the difference in my grip as I find myself really trying to use the proper grip and I constantly find myself correcting my grip. (I hope what I think is correct is correct!)

Next time at the range I will rent several other Glocks and see if they feel the same. Possibly some one there has a lot of experience with the same weapon that can give me some more feed back.

Thanks for your comments.
Bob

A definite trigger stop might help cure the "slap." With a solid stop, your finger can continue to apply full pressure in your follow-through. Reset time will suffer, though.
Another possibility is that the "pinch" may be the result of a very-slightly-too-short trigger. If the trigger is too short, it may be pinching the bottom of the pad of your finger between its bottom end and the trigger guard, as it moves forward to return to battery.

Sometimes Glock handguns will have small but sharp pieces of "flash" on the plastic parts from the molding process. If this happens on the trigger or trigger safety lever, the trigger finger will get abraded when firing as the weapon bounces during the recoil cycle. My lightly-used Glock 22 in .40 had this problem, and it was fairly annoying.

I very carefully scraped (with a small box cutter) and ever-so-lightly sanded (with fine sandpaper) the sharp edge of the tip of the trigger safety lever, and this took care of the problem.

Seems like this is fairly common on the newer Glocks; it was pretty rare 5-10 years ago.

Originally Posted by Steve M1911A1

A definite trigger stop might help cure the "slap." With a solid stop, your finger can continue to apply full pressure in your follow-through. Reset time will suffer, though.
Another possibility is that the "pinch" may be the result of a very-slightly-too-short trigger. If the trigger is too short, it may be pinching the bottom of the pad of your finger between its bottom end and the trigger guard, as it moves forward to return to battery.

This may be the problem! I an see how this could happen and imagine how it would feel! Thanks for the advice Steve,

Originally Posted by DJ Niner

Sometimes Glock handguns will have small but sharp pieces of "flash" on the plastic parts from the molding process. If this happens on the trigger or trigger safety lever, the trigger finger will get abraded when firing as the weapon bounces during the recoil cycle. My lightly-used Glock 22 in .40 had this problem, and it was fairly annoying.

I very carefully scraped (with a small box cutter) and ever-so-lightly sanded (with fine sandpaper) the sharp edge of the tip of the trigger safety lever, and this took care of the problem.

Seems like this is fairly common on the newer Glocks; it was pretty rare 5-10 years ago.

I will give it a closer look! Thanks again.