Guys, I think we won't be 100% effective until we understand what motivates the antis. There are mainly two groups of anti-gun people:
1 - The first is made up of well-meaning but generally-misinformed or uninformed people who think that if you just make it harder to get guns, society will get safer. These are the ones who only know guns through Hollywood or the Liberal media, and couldn't tell you the difference between a shotgun and a rifle, let alone between a semiauto and a full auto. While many of them are close-minded, others among this group can be swayed by calm reasoning and statistics (which are in our favor).
2 - The second is the truly dangerous group. It is made up of the ideologues, the Leftist opinion leaders and the committed statists. To them, private gun ownership is a metaphysical sin--a thumb in the eye of statism and collectivism. Since they define social justice as the state being above the individual, they won't rest until this powerful symbol of the sovereign citizen is rubbed out, neutered or at least greatly inconvenienced.
Group 2 are the ones waiting with bated breath for the next tragedy so they can whip group 1 into a panicked frenzy and send them tugging at the government's skirt demanding gun control. They are the Machiavellian demagogues. They couldn't care less if more CCWs lead to less crime (I believe that deep down they know it): to them, the problem to solve is private gun ownership, not crime.
I think it's important to target our arguments carefully if we are speaking to group 1 or group 2. It's vital to persuade group 1 that statistics, reason, the Constitution, psychology and history all point to looking for more efficient and effective ways to combat crime. But with group 2 those arguments are a waste of breath: the only realities they understand are fear of political defeat, boycotts and ridicule.
So, you're never going to persuade a committed Leftist ideologue like the Governor of Colorado that more guns lead to less crime. He must feel political pressure, and be flooded with "not in your wildest dreams, buddy" letters, emails and phone calls.
I think the calls for gun control will die down soon, once the attention span of the media turns towards the next D-R fight over the fiscal cliff or whatever have you. But I think it pays to keep in mind who we're talking to, when and how, so that we may maximize our effectiveness when making our case.
Anyway, just my 2 cents.