Nothing but make the Vampire even more angry at you.
It makes a hole approximately 50mm in diameter.
Some guns yes, but most guns would require gunsmithing to change caliber.
That would depend on the caliber, the distance you are shootingt and your location.
That would depend on the caliber, and type of bullet, the rifle uses.
Many would say the 22 Long Rifle.
.22 caliber rifle.
If properly trained, no
270
Would need more info on the rifle, caliber, model, condition and images would be nice
It dies.
They would just get a scar that would never go away
No, you cannot, and attempting to do such would be extremely dangerous.
He would regenerate.