p229r problem

Hi, I'm new to the forum and have a question. I recently purchased a p229r, I've shot it a couple of hundred times and have had approximately a dozen of times that the spent round has not ejected. Has anyone else had this experience? or does anyone have any suggestions on what it could be. Thx

A month or so ago I noticed while qualifying after I'd ejected my empty magazine and inserted a loaded mag, when I used the heel of my hand to strike the bottom of the magazine to make sure it was fully seated, the slide would fall forward, rather than remaining to the rear until I engaged the...