I'll mention one thing that I found with my Beretta 92s (used to own several). Clean is one thing, but if they weren't lubricated, they usually would start jamming before I got through 50-60 shots. They don't need MUCH lube, but they do need SOME lube, especially on the slide/frame rails. Depending on how the gunsmith cleaned it, it may be clean, but dry.
Check your instruction manual, make sure the gun AND magazines are unloaded, put some good quality gun oil on the places recommended by the manufacturer in the manual, work the slide back-and-forth a few times to spread the lube around, then try shooting it again with the same ammo.
"Placement is power" -- seen in an article by Stephen A. Camp
(RIP, Mr. Camp; you will be remembered, and missed)