Yes,a model 27 N frame revolver can handle +p ammo.I would advise you though that steady use of +p ammo will hasten the revolver becoming loose over time.Much quicker than if you used standard .357 Magnum loads.
If it misfires with all ammo then it may be that either the firing pin is damaged or the mainspring is damaged or mis-adjusted. If it is specific ammo you may have bad primers.
It can fire .32 Smith & Wesson and .32 Smith & Wesson long ammunition. These are the only ammunition types it is designed for, and is NOT compatible with other types of .32 calibre/7.65mm ammunition.
Contact S&W.
There is no simple answer. It will depend on the exact model and when it was made. Best to call S&W to get a correct and current answer.
It can fire any type of 9mm parabellum ammunition...9mm para is the same as 9x19
Contact S&W.
Be aware! Never fire ammunition in a weapon not chambered for it! Stick to the .45 colt ammo.
Yes.
If it is marked for 3 inch only; no. If it is marked for both, it should. If it doesn't, change ammo, clean, try again. It that doesn't solve it, go to a gunsmith.
Standard Catalog of Smith and Wesson.
Yes, i own a model 28 chp
Needs to be examined by a gunsmith to be safe and sure. Although S&W and the Luger both fire the 9mm cartridge.