I expect "20/20" and Geraldo Rivera to do investigative reports any day now on this "Zombie Killer" ammunition. The media will be clamoring for "Zombie Control Squads", probably within the Department of Homeland Security, and restrictions on such ammunition for "law enforcement only" sales. It shouldn't take more than a year or two to hire and train swat team style Zombie Squads, even with all the sensitivity training requirements (understanding the social issues and special needs of Zombies, etc) and special courses on the civil rights of Zombies (as a minority population Zombies have been subjected to quite a bit of prejudice over recent years).
Isn't the Zombie Apocalypse just a social tradition of this small minority population? Shouldn't we have more respect for the Zombie culture? Shouldn't we be more concerned with diversity, maybe work on some programs to make Zombies feel more appreciated and loved? Maybe a new affirmative action plan is the best way of dealing with these issues.
The average citizen should have no access to such potentially destructive ammunition anyway. No legitimate sporting purpose at all.
BATFE is probably working on special emergency regulations already, monitoring sales and investigating purchasers to make sure that none are involved in anti-Zombie hate groups or militias.
Congress will probably convene special hearings and consider laws to deal with this devastating new technology. Probably require a few fact-finding trips to exotic locations around the world (all with 5-star hotels and the best golf courses, of course) so our congress critters can study all the pertinent information on how other civilized nations are dealing with Zombies. Nobody seems to lose more facts than congressmen, but they sure can find the time to go looking for missing facts.