We need to give the .327 more time to catch on, in the sluggish economy and also being that we're in the "hangover" of the massive gun sales surge, and now the market has kinda stagnated........many people are hesitant to add a new caliber and a new gun to their collection. Most gun buyers aren't "wheelgun fanatics" like many of us, and if they don't see .327 in cheap plinking ammo like .38 Special has, they won't buy.
People who buy revolvers will keep defaulting to the .357 and .38 as a "safe" choice because they know ammo will be available for it. No one wants to buy a gun in a round they think might die on the vine.
Look at all the .480 Ruger Super Redhawk owners, it went from the most powerful handgun round in the world to fading into obscurity.......unless you handload the round is pretty much dead.