That is not slang - 40 cal stands for 40 calories, which is a nutrition measurement.
A weapon that is chambered in 40 S&W
If you mean how heavy is the bullet in a .40 caliber cartridge, the answer is, it ranges from about 150 grains to about 180 grains.
Depends on the model, all have their own virtues however the best value listed is the Springfield armory XD .40 S&W.
If you mean: 7 18 29 40 then the next term is 40+11 = 51
no. nor can you fit a 40 cal shell into a 9mm chamber...............
Depends on the load.
Not recommended
No. 10mm is close to .40 cal, smaller than .50 cal.
my opinion is the 45 ACP round has more knock down powder then the 40 caliber
Maximum range of a .40 cal pistol is about 960 meters. ACCURATE range is about 50 meters.
40 weeks in a full term pregnancy
9mm = .355 40 cal = .40