Welcome to the world of the 1911. Three areas of the gun will always need a bit of tuning to get reliable, once it’s there you won’t go back, it and the Colt SSA are the most natural pointing firearms made. (let the flame wars begin)
Now to the big 3 things
Magazines they can be picky Wilson combat, chip McCormick, and yes some guns love plain old MecGar
Feedramps most out of the box are great W/hardball but like some tweaking W/defensive, plus like all handguns they can be picky with the brand of defensive used.
Extractors, I have an officer model I carry (different brand) that was a PITA with malfunctions until $30 later and a new Wilson extractor correctly tuned it into a very reliable carry gun.
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