No, they are not.
No
Yes. For every caliber of ammunition, there is a hollow point round that goes with it, except for .50 caliber machine gun and sniper rounds.
Hollow point bullets literally have a hollow point, and ball ammo does not.
No
No, they are not.
Yes, you can find a wide variety of readily available 9mm hollow point bullets and ammunition.
yes
No
Yes.
yes
Yes
http://en.wikipedia.org/wiki/Dum-dum