Rip... it's not about blame... it's about tracing a bullet to gun and possibly a shooter. Rather than wave our hands and say there is nothing that can be done, there is something we could do. Unfortunately the NRA opposes it.
Kinda funny... this is one of those instances that Eagler likes. You know... if you've got nothing to hide, you shouldn't be worried.
If you're not planning on committing a crime, why should you care if the government identifies the ballistics characteristics of your weapon?