I too just purchased an SR 22. It has a lot to live up to. I've had a MkII for twelve years and a Single Six for eight. Also my wife has a Bear Cat, so lots of nice Ruger rimfires around. The cartridge case is dated 9/12 so it's very recent manufacture. I've run around 140 rnds of Remington bulk through it with zero malfunctions, a mag of CCI Mini Mags with no issues but today I put a hundred rounds of Federal bulk and had quite a few failures to feed. Very nice shooing little gun. I've always liked the Walther P22's for looks and size but the early magazine issues and the zinc slide always kept me away. I did put in the O ring for a buffer and so far it works well. I'm pleased but will withhold recommending them until I get more rounds through it.