Contacted Sig about the rough ramp/chamber and they said it’ll smooth itself out as it is normal for most of their guns.
Asked if it should be polished and they said no, none of their feed ramps are polished and it should not need it. I pointed out that my P238 came with a polished feed ramp from the factory and apparently that is odd. “It must have needed extra attention to get up to spec”.
Can’t tell if bullshit or fact but if Sig says it’s fine then I’ll take their word for it.