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.
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.
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.
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.