Your allusion to scraping the grooves on an old record is apropos. I'll check for these lines on the bbl. the next time I check out a Bersa. Sounds as if they may just not have finished the barrel exterior well.
I did see another tonight, and this store did take off their lock, so I could check the cocking and trigger actions, which were examplary. I was quite impressed. However, the tip of a spring within the trigger was protruding a bit behind the trigger, and one could get snagged on it. I'll soon know if this is unusual.
At this point, I'm leaning strongly toward buying one of these .380's.
On another note, I decided NOT to consider the S&W-made PPK/S, after fighting the heavy recoil spring and actually cutting my left forefinger on the sharp rear sight while trying to cycle the slide. With the heavy spring and the thumb safety making a good grip hard to take, the Walther left me underwhelmed. But I usually have those problems with the PP series, just never cut a finger on one before.
Looks like Bersa, at this point.
Lone Star