Pure theory/conjecture here, just my own thoughts, nothing and nobody else involved...
Shotgun sports are largely an upper-class thing or at least a big part of what you'd call shotgun sports are an upper-class thing. Take a look at some of the guns listed on the "premium brands" link starting from the manufaturers' page at shotgunworld:
Baretta appears to me to be selling its main hunting gun (the X-Trema II) as a sort of a loss leader i.e. they're selling a very superb semiauto gun for 1000 - 1500 usd and I don't see how they're making any money with it. They seem to make their real money selling skeet and sporting-clay guns which start around 2500 and go to several tens of thousands usd.
In other words, ******* with shotguns or their ammo would be like ******* with golf, and all the bankers and fat cats who Bork Obunga works for would come down on him like a ton of bricks.
No problem buying Federal 12ga target shells at Wallies today, still no 22 ammo in sight. 22 Of course would be the ammo which common people would use to try to put food (snail darters, delta smelts, Bambi, Thumper, spotted owls, and every sort of sacred2Gaea thing) on their tables after Bork's asshole policies bring the entire system down.