It can cause the extractor to chip.
It isn't designed to jump over the case rim. Like many have said, it is supposed to slip up from underneath.
Extractors are normally hardened to resist wear. Hardened parts can chip if they are hit wrong.
Doesn't always happen, but it can.
Don't rechamber rounds. Any rounds. The cost savings isn't worth the potential problems.
I am no longer participating in gun forums.