Been running it for a year. No such issues. I've heard that can happen if you also use the 4lb striker spring and the 6lb trigger spring all at the same time. But no such problems with several hundreds of rounds fired with it.

Stock springs in the Glock.

I noticed today at the range that I can't perceive a difference in recoil between 9mm 124gr and .40 caliber 140gr. Also, I could not tell a difference in the recoil between my G23 and a friends G21. Not sure what weight the 45acp ammo was though, probably 185gr.

Been running it for a year. No such issues. I've heard that can happen if you also use the 4lb striker spring and the 6lb trigger spring all at the same time. But no such problems with several hundreds of rounds fired with it.