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).
.380 ACP is a specific type of ammunition made. 380 LCP is the name of a Pistol, made by Ruger which fires the .380 ACP round.
There is no difference. ACP stands for Automatic Colt Pistol.
Same thing. Yes.
yes.
Nothing.
32 ACP
Yes
7.65 = .32 ACP
.32 caliber is not enough infromation. Ammunition marked "7.65 Browning", ".32 auto" and ".32 ACP" for practical purposes, are all the same. Do NOT try to use ammo such as ".32 magnum" or ".32 long" as it would be a different round.
.45 ACP means Automatic Colt Pistol. It IS .45 Auto.
YES.................... Yes, it is commonly available.
There is no .25 Magnum. There IS a .22 magnum, made by Davis, and a .25 ACP. Value is about $50-$75.