* Customer may request ammunition of a particular caliber, as long as the chain covers it. If the chain's focus does not cover the caliber, it is '''never''' in stock.
* If the caliber requested is covered by the shop chain, '''roll 2d10-2''' to determine the number of retail ammunition boxes in stock. If the result is between 9 and 17, a bulk can is also in stock. If the result is 18, two bulk cans are in stock.
** ''Rare calibers''(calibers for which no retail weapon is available) are available at all gun shops, but they carry only '''1d11-2''' retail ammunition boxes per caliber. If the result is 9, a bulk can is also in stock.
* After determining that their choice's calibers are in stock, the customer may select a retail box or bulk can of their chosen caliber, then request a particular brand and projectile type. There is no method to randomly roll these; if there are boxes in stock, the customer gets to "choose" what they want; balancing is provided naturally through the cost of ammunition (the good stuff costs a lot more, the surplus stuff is pretty cheap).
* At the customer's request, they may purchase ammunition piecemeal (less than a box or bulk can) if they wish to purchase smaller quantities.