The out of production S&W model 3000 is a pump action shotgun. Was made under license by Howa, in Japan. A fine firearms maker. They came in 20 gauge or 12 gauge. 2 2/4 inch and 3 inch chambers and varied barrel lengths. The Police Model is still in service with some agencies and by all accounts, a fine weapon. Similar in action and function with the venerable Remington Model 870.
Yes
You will have to call S&W to get a correct answer.
NO
yes, but better to use standard ammo. +P ammo shakes the pistol a lot.
1. It can, but, it is not advised. 2. It is stated by Smith and Wesson that the model 14-3, which is the third change of the model 14 can safely shoot plus P ammunition.
What it is chambered for. SHould be marked on the barrel. Have a gunsmith check it out.
You must contact S&W to get a correct answer.
Ammo, imporper assembly, dirty
You can, but, you should not. The frame is not rated for +P
9mm parabellum
You must contact S&W to verify
9mm