Cost per round
Wardogs charges you for ammunition separately, by calibre. What you carry costs money before you fire a shot.
Every figure below is the box price divided by the rounds in it, taken straight from the shipped vendor tables. Armour-piercing and hollow point are priced against the standard load in the same calibre, so you can see exactly what the upgrade costs you per trigger pull.
Standard
Armour piercing
Hollow point