I often carry my S&W 3" 44 magnum model 629. And for the sake of recoil control and rapidity of rounds fired I often carry it with the new 44 SPL Critical Defense load from Hornady. I also often carry my 2 3/4" Security Six with 158 grain Fiocchi XTP loads. I began wondering about the difference between these loads based on the shorter barrel lengths and the relatively light 44 SPL bullet weight. So I did some testing with my chrony (average of 10 rounds). The Critical defense round clocked in a 165 grain 44 SPL round traveling at 915fps from the 3" barrel and the Fiocchi 158 grain 357 mag round clocked in at 1178 from the 2 3/4" barrel. The bullet weights are very close. The velocity edge goes to the 357, but the diameter of the round goes to the 44 SPL. I just wish I had gelatin blocks to test expansion of the two rounds. So, based on this data and ignoring weapon size. What's your opinion? Which is "better" ? P.S. I used the word better loosely for the lack of a more suitable word. .