No. Only what is stamped on the barrel.
No. 9mm Parabellum ammo is about .35 caliber, and the .45 is, well, .45 caliber. The .45 cartridge is too wide to fit in the chamber.
There is no 45 apc, but, there is a 45 acp. The 45 Colt is a longer cartridge. There is no 45 apc, but, there is a 45 acp. The 45 Colt is a longer cartridge.
No. If it will even fit (the rim of a 44 magnum cartridge is much larger than a 45 Colt) it would be very dangerous to do. 45 Colt firearms were not designed for the forces of a 44 Magnum cartridge.
Whether for pistol or rifle, .22 Winchester Magnum Rimfire ammo is loaded with bullets ranging from 30 to 50 grains. The standard seems to be 45 grains.
There are currently no semi auto firearms on the market which chamber the .45 Long Colt.
I'm not aware of a .45 Magnum. There is a .44 Magnum. The 44 magnum is typically a revolver round, very high power. The 45 ACP is typically used in semi-automatic pistols. The 45 ACP is not as powerful compared to the 44 magnum (mostly due to the amount of propellant in the 44 magnum compared to the 45 acp).
There are numerous handguns that will fire more than one caliber or type of ammo. The Taurus Judge will fire .410 shotgun ammo or .45 Colt ammo. Smith and Wesson has just started producing a gun similar revolver called the Governer that will fire .410, .45 Colt, or .45 ACP. You can fire .38 special in any gun that is chambered in .357 magnum (but not vice-versa) or .44 special in a gun chambered for .44 magnum (but not vice-versa). Also there are other types. There is a very rare revolver called the Medusa that will fire anything in the .38 or 9mm family, including 9mm Kurz (380), 9x19mm, 38 special, and .357 magnum.
any 45 cal ammo will work in a 45 cal pistol
I own oneof these guns and the .45 acp ammo works perfectly in it. The only thing i can think of is a bad barrel. The good thing about these guns is that the barrel is interchangeable with a colt standard 1911.
45 ACP
.45 ACP