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.
No
what does a40 cal. bullet look like
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....
40$
All else being equal, the one that has more foot pounds of energy.
No, never attempt to fire ammunition in a weapon it was not designed for!.
uuhhh... no, you cannot fire a 9mm parabellum through a .40 s&w.9mm converted to inches is .35 now you see that .40 is a little wider.
100-400
it might be for the Krag rifle, cal. 30/40..... not 30/06
It's going to vary between manufacturer's and bullet weights, but avg velocity is around 1050 fps
Given proper shot placement, none.
Yes and no. The. 40 S&W is not interchangeable with the .357 Magnum, if that's what you had in mind. Most .357 Sig pistols can, however, but a .40 barrel will have to be dropped in in place of the .357 Sig barrel.