While reloading components are not as easy to find as they were before the current run, they are all still available. Generally, I can't just walk in and buy gunpowder, but by talking to the owner I am able to find out when the next shipment is due and call them the day that it arrives to verify that it came in before running over to get what I need. Personally,I try to avoid the big box retailers and do business with the locally owned shops. If for no other reason then I would rather give my money to a local business that knows me then to some corporate who only cares about what is in my wallet.
Warbird, You answered your own statement. They are shooting more because they can afford to shoot more. How much would your friends ammo cost if they were buying it off of the shelves. So are they shooting more because they have to, or because they enjoy shooting and now that they can afford it they choose to enjoy their chosen pasttime more? Also, the odds are that they are shooting ammo that they have tuned to be optimal/most accurate for their particular guns. And I will wager that they enjoy the hobby of reloading too.