If you buy a modern 1911 from any production line, you should just assume it was assembled with minimal fitting and never touched by a gunsmith. It may work, it may not. If it functions reliably with defensive ammo, it's luck. Money increases luck (e.g. Colt and Dan Wesson), but money spent with a gunsmith buys reliability.
Out of the box, assume the lower barrel lugs and barrel link are not fitted, the OEM magazine is crap, no one has spec'd the magazine release for proper height of engagement, the ejector is not fitted, and the extractor is neither fitted nor tensioned.
Function problems are almost never feed ramp/chamber geometry issues.