Argh! Would've waited if I knew. Wish the pistol version was out now for this. By the way, tried Remington's in mine to experiment, 100 rounds. I normally use CCI mini mags. There was a lot of smoke that came out of the ejection port every time, the rifle shot really lightly-almost like with subsonic .22's and a suppressor. CCI is the way to go. Will try some Federal bulk pack if I ever find any.