12 ga. has a far more diversified variety of shells (loads) than 20 ga. If you don't want to reload, there are many shell types to choose from. Bigger, hotter, faster 12 ga. loads are best for bigger, tougher or faster birds such as ducks, geese and turkeys. 12 is necessary with buckshot or slugs for deer in some places. 20 ga. is better for smaller birds such as pheasant, grouse, woodcock and snipe. 20 is OK with slugs for deer. Both are used in shooting games like trap, skeet and sporting clays and I use both. 1 ounce of shot pellets is exactly the same quantity from either size shotgun. The gauge refers to the barrel diameters where that is the number of lead balls, fitting into the barrel, which weigh 1 pound (16 ounces).
Around $150.
There isn't one
The value of a Simmons Royal double-barrel 12 gauge shotgun varies by its condition. As of 2014 this firearm in excellent condition sell for around 150.00.
12
Depends entirely on the gauge and size of shell. Can vary from 9-30
OO Buck contains nine .32 sized lead balls.
It depends on what kind of shot/cartridge you use. Shot, being the pelllets inside the cartridge, come in many different sizes, from 1mm to 9mm.
NO!!! A 12 gauge shotgun takes only 12 gauge shells. A 20 gauge shell would fall into the barrel and get stuck about half way to the muzzle. You would be in for a nasty surprise when you put a 12 gauge shell behind it and pulled the trigger!!!
12 guage shell?
The number of shots (pellets) in a 12 gauge 3-inch shell can vary depending on the specific type of shot and its size, but a common load for a hunting shell might contain around 1 to 1 1/8 ounces of shot, equivalent to around 170 to 200 pellets of size #7.5 or #8.
7000
The 20-gauge shell will fall into the barrel and lodge. When a properly fitting 12-gauge shell is chambered and fired, it will blow up the barrel and you will have a very bad day.
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it is not safe to fire 16 gauge shell in anything but a 16 gauge.No shells will interchange with other gauge guns since a 16 gauge shell would fit in a 12 gauge chamber, I would think you can do this.
The danger is that the shell will fall forward, blocking the barrel, but allowing a 12 gauge shell to be loaded. If that is fired while the barrel is locked, the gun will likely blow up, destroying gun and injuring the shooter and innocent bystanders.
The 16-gauge (Note how it's spelled) shotgun shell will hold slightly fewer pellets (small BBs). It will have slightly less recoil, but the difference will be so small that you might not notice it. Some 16 gauge shotguns are built lighter and smaller than the 12-gauge versions, but that is not always true. And you should know that today 16 gauge ammunition is less common than either 12 or 20 gauge. 30 or 50 years ago, 16 gauge was very popular but now it is getting rare.