I was playing around with remingtons ballistics info and was a little suprised to see that 40S&W is as good if not better than 45ACP in some cases. I'm sure I'll get ripped a new one for this but! on the remington site they list 180 grain remington express JHP at 368 ft/lbs of energy at 50 (feet? yards?) and 185 grain remington express JHP 45acp at 362 ft/lbs of energy. I'm ballistics expert but more energy in a bullet with smaller area I would think it going to be more powerfull on impact. So can someone enlighten me to the differences between these two calibers?