12 Gauge Shotgun Shells
Buckshot – 4d6 or 2d6
Slugs – 5d6
Magazine Sizes: Varies, usually 4 or fewer for civilian shotguns, 5-8 for law enforcement
Buckshot – 4d6 damagevs living, 2d6 vs zombies. Fires a spread of pellets.
Slug – 5d6 damage. Fires one large projectile.
Gauge is determined from the weight of a solid sphere of lead that will fit the bore of the firearm, and is expressed as the multiplicative inverse of the sphere’s weight as a fraction of a pound (e.g., a 1⁄12th pound ball fits a 12-gauge bore). Thus there are twelve 12-gauge balls per pound.
Certain sizes are more common than others; 12 gauge is the most common size, with up to 50% of the overall shotgun market in the United States.