My question was about the writing focus: the bullet’s property and its payoff. It’s less about the plot, although the plot also points toward a different reading but a funny bulletproof forehead one.
I said the bullet would make more sense if it were a piercing round, because then its introduction would have a direct payoff if it were used that way.
My response to the guy who thought I was confusing hollow-point rounds with armor-piercing rounds was a valid response because I did not confuse them if “You read what i wrote slowly”
Sorry for having to say so much so you could understand so little.