I believe its .40 S&W or .45 ACP. Pros & Cons to both, trade off in ammunition capacity, recoil severity, etc....
Comes down to personal preference. FBI is keen on the 40 S&W. Most 40s will have a larger capacity than 45s. Go to a range that rents guns, and see which you prefer. At this point, its about personal preference more so than effectiveness (they both are good defensive rounds).
Check with your local police agency that uses 40 S&W
There isn't a .40 ACP - the cartridge you're thinking is the .40 S&W. Basically, it's a larger cartridge than the 9mm, being essentially a shortened version of the 10mm auto cartridge.
40 cal ACP (not CAP) is the same as 40 cal. S&W. ACP refers to 'automatice cartridge pistol' wheras S&W refers to Smith and Wesson, who also make the 40 cal. cartridge....
No such Model in the Colt line.
.40 is the more powerful ---------- I would have to beg to differ on that one. The highest energy .40 S&W round produces 500 ft/lb... that's the 155 grain Guardian Gold @ 1205 fps. The 200 grain Speer Gold Dot in .45 ACP produces 518 ft/lbs, while the 185 grain bonded defense produces 616 ft/lbs. So sure, there are some .40 loads which produce more energy than some .45 ACP loads, but overall? No.
my opinion is the 45 ACP round has more knock down powder then the 40 caliber
.40 S&W cartridge, bullet diameter = .401" .380 ACP cartridge, bullet diameter = .355-.356" .32 ACP cartridge, bullet diameter = .311 - .312"
Best is a bit too subjective for an accurate answer to be given here. First off, best for what? You're listing cartridges ranging from the .22 up to the .45 ACP, then PDW cartridges.. all of which have a particular niche which the other cartridges listed may not necessarily fill.
40SW refers to the .40 Smith & Wesson, a type of handgun cartridge developed by Smith & Wesson and introduced in 1990. It was designed to provide a balance between the higher stopping power of the .45 ACP and the higher magazine capacity of the 9mm. The .40 SW is commonly used in law enforcement and personal defense due to its effective performance and manageable recoil.
Any of the major reloading books should have what you want.
A Glock typically uses 9mm, .40 S&W, or .45 ACP cartridges, depending on the model. The 9mm bullet has a diameter of approximately 9.01mm, while the .40 S&W measures about 10.16mm, and the .45 ACP is around 11.43mm in diameter. The length and weight of these bullets vary, with 9mm bullets usually weighing between 115 to 147 grains, .40 S&W weighing about 165 to 180 grains, and .45 ACP typically weighing 230 grains.
Glock pistols are made in a variety of calibers. Currently available in .380 ACP, 9mm Luger, .357 Sig, .40 S&W, 10mm Auto, .45 ACP and .45 GAP.