I had an Oly back in the mid 1980s. This is when they built them from junked parts and it was crap. It keyholed half the rounds I fired.
Since they have gotten serious about building them the quality has increased.
Yeah, I'm aware of Oly's early quality problems, but I bought mine last year and it's gone through several thousand rounds without a problem of any kind, so I guess they worked it out.