- 2 to 6 casing can be found on the dead body of an enemy that was wielding a .45 Auto pistol or a .45 Auto submachine gun at the time of their death.
- After the completion of Honest Hearts the casings will also begin appearing in the main game at the Gun Runners' store, Quartermaster Bardon at Hoover Dam offices and traveling merchants.
- You can buy 30-50 at a time at the Gun Runners' store, and upwards to 200 at a time at the Great Khan armorer.
- In Zion Valley, .45 Auto cases can be found commonly in ammunition boxes.
- Zion Ranger station (trash bins, roof, truck) Five around
- Zion fishing lodge's trash bins (outside). Five in
- Occasionally some traveling merchants will "sell" .45 Auto casings (among many other calibers), but they will always be for free. Likewise, if you try and sell casings to a merchant, you will not yield any money. (Note: This is only possible after you have completed the Honest Hearts add-on.)
These casings can not be acquired before traveling to Zion Canyon even with Honest Hearts add-on installed, as they are not available in vendors, and no enemies will use .45 Auto ammunition before that point.
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