Do a web search on "12 gauge ammunition types" Over a dozen.
$4 or so.
12 gauge shells.
I like buck shot. OO.
No, you can not shoot anything but 12 gauge shotgun shells through a 12 gauge shotgun. Never use any ammunition other than what the firearm was designed for.
Your winchester model super X2 should hold 5 rounds of shotgun ammo.
a 20 gauge is a type of many shotguns but it is smaller than a 12 gauge but bigger that a 410. a 20 gauge is a good shotgun for all ages.
Have it checked over by a good gun smith.
12, 16, 20, 28 gauge, or .410 bore, depending on what it is chambered for.
12 gauge
12 Guage is the least expensive ammo. It is the most commonly used. For most common loads 20 guage can easily be found at the same prices.
12 gauge is thicker than 14 gauge.
They are now a division of Allient - and their plant is located at the eastern edge of Anoka, Minnesota. They date back to the 1920's.