[Evascythe]

From: http://en.wikipedia.org/wiki/.32_ACP

The .32 ACP (Automatic Colt Pistol) pistol cartridge is a semi-rimmed, straight-walled cartridge developed by firearms designer John Browning, for use in semi-automatic pistols. It is also known as the 7.65 x 17 mm Browning or 7.65 Browning. Introduced in 1899 by Fabrique Nationale, the cartridge was first used in the Browning M1900.

Design

It was designed for early blowback semi-automatic pistols which lacked a breech locking mechanism; the relatively low power of the .32 ACP round made it a practical blowback round.

It is still used today in blowback semi-automatic pistols, as well in modern locked-breech, single column magazine, deep-concealment, semi-automatic pistols.

Cartridges in .32 ACP are also sometimes used in caliber conversion sleeves, also known as supplemental chambers, for providing an alternative pistol caliber carbine functionality in .30-caliber hunting rifles.

Your other bullet comes from a Winchester Model 1894.

Read about it here: http://en.wikipedia.org/wiki/Winchester_rifle


ps - I don't know if the above information is correct.
I just pasted your findings into Google and went to the Wikipedia links. <.<