Notice that all guns have a really bass boom when shot? Even .22 BOOM. They almost never leave the sound of gunshots unedited.
Actually, if I understand it right, they do leave the sound of gunshots unedited. That's because they don't use them at all. They can't. At least not with analog tape. I don't know about digital tech, but with film/video tape, the sound of a gunshot maxes out the media (pegs the meters), and comes across as a loud pop, no matter the caliber. .22s are smaller pops, but they are all pops, sounding nothing like a real gunshot.
The gunshot sound effects are just that, sound effects, intended to make us think of the actual sound of the shot. They "sound like" a gunshot on film, but aren't actual gunshots.
(and Glocks with safeties arn't just movies, and for some reason, it annoys me more in the books I read)
I saw some Glock safeties for sale at the gunshow last weekend! Apparently its a little widgit that you stick in behind the trigger, and push out with your finger when you need to shoot. Amazing!