hi i am a new member and i would like to share my opinion about the 45acp cartridge. i dont think the 45 is a very good cartrige. actually, i think it is one of the worst cartriges ever designed. the rim of the cartrige is too large. it catches in the indentation of the next round in the magazine. as it is being fed into the chamber, it catches on bottom while it is being pushed by the slide from the top. then, it points downward. this is not good. especially for feeding. 9mm cartriges and 40 cartriges constantly point upwards as the are being fed. they glide out of the magazine smoothly. load a 9mm magazine and load a 45 magazine and then unload them. you will see what i am talking about. this is why most 45auto pistols dont function well with hollow points. it is hard to feed a hollow point bullet when it is pointing down at the feed ramp. the only way to do it is with lots of momentum from the slide. and if a pistol design requires very much momentum to work, then it is not a good design. besides being difficult to feed, the 45 has less fire power than a 9mm. when using fmj ammunition, the 9mm will penetrate much more. a 45 will not go through a garden shovel but a 9mm will. i tried it using cheap winchester target ammunition. i have shot a lot of varmints and small game with 9mm, 40, and 45 caliber hanguns and 40 caliber hollow points seem to make the biggest holes. 9mm holow points make almost as large of a hole as the 40. 45 fmj make a much smaller hole and it seems that the 45 is the weakest handgun cartrige of the three...at least from my experiments with wood and sheet metal and stuff. there is only one reason the 45acp cartrige is still popular,the 1911. i like the 1911 but i wish it was 9mm or 40 caliber. then you could afford one that works and it wouldn have to rattle to function. you can go ahead and talk about the 45's legendary power, but you are just spitting out a bunch of b.s. the 45 acp is not good.