I'm looking at possibly getting a new Springfield XDS 45 as a pocket pistol for summer carry when they come out, but lately I've been on different forums researching them and quite a few people have said that a 45 will not perform well out of a 3.3" barrel and that a short barrel 9mm would be better. I've researched the velocity loss on ballisticsbytheinch.com and they show that both the 185gr +p and 230gr both lose about 8-9% velocity going from a 5" barrel to a 3" barrel. The 9mm 124gr +p and 147gr lose about 9% velocity going from a 5" barrel to a 3" barrel also. So I'm confused why do people keep stating that a 45 acp out of a short barrel is a poor performer? According to ballisticsbytheinch.com a Federal 230gr 45 ACP out of a 3" barrel chronographs at 811 fps. Compare that to a Federal 225gr 45 Colt round chronographs at 791 fps out of a 5.5" barrel. So wouldn't a XDS with 5+1 45 ACP have the same firepower as a full-size 45 Colt 6 shot revolver (which I don't think anyone would call underpowered), or is there some other factor I'm missing? Please let me know your opinions on this topic. Thanks Wanna kill these ads? We can help!