It is working...

Even if it's a little slow, but as Uncle pointed out in a couple things today, OC is making somebody obviously carrying a handgun less of big deal and a bit more "normal."  As Sebastian notes:

if the folks who are engaging in attention seeking behavior now need to up the ante to rifles, because pistols just don’t grab attention like they used to, maybe there is something to the OC theory.

I'm still not going to go around town with a long gun though.  I've spent plenty of time lugging a rifle around 24/7, and it's a pain and more annoying than not if you rarely have to use it.