Many types of ammo often cater to the hunter or target shooter in mind, so you can perform your best when it's go time. 12 Gauge Ammo Designed To Perform As you're heading off to spend the day in your favorite hunting spot or up at the shooting range, you want your shotgun ammo to function at its best. About Shotgun Shells The components of a shotgun shell include the rim, primer, brass, shell case, powder, wad and shot — with the exception of shotgun slugs, which are like blunt bullets encased in a shotgun shell and used on larger game. 12 Gauge Flechette Shot Shels - 3 Units Per Package 12 Gauge Flechette Shot Shels - 3 Units Per Package $19.99 $14.99 Add to Cart 12 Gauge Flechette Shot Shels - 25 Units Per Package $134.99 $89.99 Add to Cart.410 Gauge (Judge) Flechette Shot Shells - 3 Rds per pack $17.99 $14.99 Add to Cart $19.99 $14.99 Add to Cart More Info Order# G12-015.