I wasn't surprised to see the Makarov mentioned a few times. I had one 20 years ago, and it would shoot anything I put into it, and generally group them under 1" at 10 yards offhand. Well, I "needed" a 10-22, and traded away the Mak.
About 10 years ago I started replacing all the firearms that I liked and foolishly traded away, and the Makarov was one of the first. Russian made, adjustable sights, and chambered for the easy to find .380 ACP, a showpiece it's not, but when you get an autoloader that shoots this well, never get rid of it! As an aside, that 10-22 I traded my first Mak for is long gone!
My second biggest surprise was an H&R Model 365. A single shot, bolt action .22 that would group under an inch at 50 yards. I still have this one.