Is it a common occurrence for newer 870 barrels to have more noticeable machining marks than older ones? I bought a new 870 20 ga w/26" barrel last year and I recently noticed that it has quite a few obvious machining marks in the barrel than my other 870's (which are all 10-20 years old). So my question is, has the quality of the newer barrels gone down when compared to the older ones or did I just get a bad one? I took a closer look to at my older ones and the bores on them are smooth as silk. I polished the 20 ga barrel yesterday and the marks didn't appear to get any better. Is there anything I can do to smooth em out or is it not as big of a deal as I think it is?