We weren't issued beanbags, so I've never seen one firsthand. The police department near where I grew up used them on suicide threats on the bridge out of town, but as I understand them the primary purpose is riot use. A line of cops fires beanbags into a crowd from behind a shield line, suddenly no one wants to be there anymore and you don't have nearly as many bodies to explain on the news as you would if they used 00 buck. I prefer John Cooper's solution: a suppressed .22 shot to the lungs of whomever is inciting rioters. No one knows what happened, he just finds it very hard to yell all of a sudden. Not sure how well it actually works, but I like the concept. Maybe just use a .308 and get it over with?
Around me the big box stores only sell the "hunting" calibers in any quantity. 30-30 and 30-06 are easy to come by, as is low-grade .308, but some areas are shotgun-only for hunters and their stores reflect that. 5.56/.223 Rem can be had, but with two wars going on the majority of it was overpriced. Lake City can sell their cheap stuff to the government for more than any of us is willing to pay even for Black Hills Gold.
I've never been a reloader, but I may get into it if ammo prices get much worse. It used to be about $0.85/shot for factory match ammo, now it's more like $1.25 and rising. And I don't shoot the exotics, the strangest caliber I've even considered is .260 Remington (Now up to $1.75/shot using the Black Hills Gold 120 gr Hornady GMX, a little less for the 129 gr Remington Cor-bon performance).