$1600 per bullet was my proposal because that seemed like a logical number that would deter even irrational people who intended to commit murder. If you believe that a different figure, higher or lower, would accomplish the same end, then I'm open to suggestions. I'm happy to start with a lower number, but my thinking was this: what would be the cost of a full magazine? That would be 30 bullets in an AR-15* as just an example. At an average of 25 cents a bullet, that's $7.50. At a cost of $100 a bullet, that's $3000. That's certainly better, but I don't feel convinced that would deter a crazy person determined to murder people. However, at $1600 a bullet, now we're talking. The cost of that magazine is now $48,000. I could be wrong, but that sounds like a number that would deter even insane people from purchasing the magazine with the intent of murdering multiple people. Not because they would decide it was a bad idea (they're insane, after all), but because at that point a significant portion of the population is no longer able to afford it.
And for the eight billionth time, I acknowledge that this will create a black market. As long as this new black market doesn't create a volume of product that is equal to the normal volume, then I am okay with that.
*Before you jump down my throat for any errors in terminology, keep in mind that I don't actually care what the proper terminology is.