10mm bullets

10mm is an ammunition type in Fallout, Fallout 2 and Fallout 3. 10mm ammo is exceedingly common as the game progresses, and ranks as the most common Small Guns ammunition in all three games. In Fallout Tactics and the canceled Van Buren it was replaced by 9mm ammo.

In Fallout and Fallout 2 there are two types of 10mm ammunitions, 10mm AP and 10mm JHP. In Fallout 3 there is simply one type of 10mm Round.

Before the War, 10mm was the standard ammo for the Bureau of Alcohol, Drugs, Tobacco, Firearms and Lasers, while the military was more reliant on experimental energy weapons.

Weapons Using 10mm ammunition
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Fallout and Fallout 2

 * Pipe Rifle
 * 10mm Pistol
 * 10mm SMG
 * H&K P90c

Fallout 3

 * 10mm Pistol
 * Silenced 10mm Pistol
 * Chinese Pistol
 * Zhu-Rong v418 Chinese Pistol
 * Colonel Autumn%27s 10mm Pistol
 * 10mm SMG
 * Sydney%27s 10mm %22Ultra%22 SMG
 * }

Quotes

 * I picked 10mm since it wasn't popular, had been tested by the FBI at one point (and found lacking), but it was basically a gun nut (which I am one) kind of round. .45 might have made more sense, but I was looking for something with a little twist. - Chris Taylor