I'm not sure where you are getting your information regarding the Beretta and the 2 3/4 inch loads being unreliable. I shot about 4 boxes of 2 3/4 inch at the range and did not have a single hiccup. I was using standard weight #8 loads. One of the reasons I went with the Beretta was its ability to handle a wide variety of loads.
The ATF should be a convenience store instead of a government agency!