You will have to call S&W to get a correct answer.
You can, but, you should not. The frame is not rated for +P
No. This was made long before +P ammo was created.
Yes
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.
Ammo, imporper assembly, dirty
9mm parabellum
You must contact S&W to verify
9mm