I am that "friend" who suffered through magazine hell! The Wilson Combat 10 round mags would not feed 10 rounds. Metalform 10 round mags would not feed 10 rounds. I had to go with Metalform 9 round mags in order to avoid jams and miss feeds. I'm a firm believer in 10 round magazines being able to feed 10 rounds flawlessly. Dan S lent me a few 9 round mags that he had configured to hold 10. They worked but the slide would not slide back after firing 10 rounds. Joe D let me borrow his Tripp Research 10 round magazines and they were flawless. I am now able to enjoy shooting my handsome S&W Pro Series 1911. Don't waste your time or money in search of a consistent magazine for the S&W. From my experience, it is the Tripp! Tripp Research took the time and effort into developing a 10 round magazine that works consistently and flawlessly in the 9mm S&W.
Best regards.
I've been using the Wilson Combat mags that came with the gun (plus 3 more of the same model), and have had no issues with feeding over hundreds of rounds. I guess I got lucky.