The JC Higgins 20-12 shotgun is typically chambered for 12-gauge shotgun shells. It is designed to use standard 12-gauge ammunition, which can include various types of shells such as birdshot, buckshot, and slugs, depending on the intended use. Ensure to check the manufacturer's specifications for any specific recommendations or limitations regarding ammunition types.
.32 S&W ammo
Whatever they could fit into it.
You may use any brand of 7mm Magnum rifle ammo.
22 Long Rifle
30/06, 150 grain
its an ability, some classes don't get, otherwise just use the ammo ability to equip it.
I think you mean 22 WMR ammo. If you buy ammo just ask for the 22 WMR which is different then other 22 ammo
To get infinite ammo in Fallout: New Vegas, you can use the console commands if you're playing on PC. Open the console by pressing the tilde key (~), then type player.additem 0001C26A <number> to add that specific ammo type to your inventory, replacing <number> with a very high number. For truly infinite ammo, you can also equip a weapon that uses that ammo type, but be aware this method doesn't apply to all weapons and ammo types. Alternatively, using mods can grant infinite ammo without the need for console commands.
Use a .22 magnum. It will kill a deer.
Remington .270, 150 grain.
The JC Higgins Model 583.21 shotgun is designed for 12-gauge shells, not 16-gauge. Using 16-gauge slug ammo in a 12-gauge shotgun can be dangerous, as it may not fit properly and could lead to malfunctions or injuries. Always use the correct gauge ammunition specified for your firearm to ensure safety and proper operation.
You can only use .30 carbine ammo or the European designation 7.62X33 ammo