Shot about 200 rounds of CCI Mini-mag 40g round-nose bullets, and had about 8 mis-feeds/jams/bent rounds. Alternatively, shot a bunch of Aquila and Federal bulk ammo with no failures. Also...get this: shot about 75 rounds of Remington bulk ammo with only 2 FTF (both ammo-caused). Go figure. I think I'm going to call S&W to send it back again. Ugh. Don't mind but am unhappy that it is not as perfect as others' on this forum. Our Walther P22 LOVES the CCI Mini-mags, so this would be a good thing for the MP22 to eat them properly...
Edit: the jacked-up cases had dents in the side...strange to me. ***?