I bought both a 12 and a 20 gauge when Wal-Mart was clearing them out a few years ago. The twelve has been flawless. The 20 I had to break in with heavier loads, but it seems to cycle everything now.

On a side note, the twelve will cycle aguila mini shells if you only put one in the magazine. If you put two in the magazine, it creates a he'll of a jam.