Online ammunition retailer LuckyGunner has published the sales and visitor statistics they collected during 2012. I am surprised by the figures. I would have guessed 7.62x39mm was a better seller than it is. I guess not everyone shares my enthusiasm for the venerable 7.62mm Russian.
Plenty more ammunition statistics for you data junkies at LuckyGunner Labs.
Like just about everyone else I have been hunting for 5.56mm ammo. I recently emailed Luckygunner, whose 5.56mm has appeared to be out of stock since the election, and asked when they were getting more stock. They told me that new ammunition is coming in all the time, but sells out almost instantly. I would not be surprised to if the same thing was not happening to all online retailers.