Buy all you can get your hands on..... that way next June I can buy all the surplus at garage sales for $10 per 1K, like the good old days. Remember this happended in the 90's, ok not to this extent but I buy what I shoot with a "reserve". If you shoot 5 or 10K a year, then you probably HAVE to buy what you can. I only shoot about 2500 rounds of .223 per year, so a case sits me fine. I only use #41's for .223 and WLRP for .308 bolt, I stay with these. Now if I run out I might check alternatives.
Just my .02, for the last 9 months have been like the albino deer in Wisconsin, elusive at best, but the last few weeks they have been showing up more and more. In fact I see on Craig's list and Backpage guys who bought too much and are selling at decent prices prices. The economy is really tough here in Las Vegas so I expect to see guys dumping reloading supplies, ammo and guns becuase they over bought.
YMMV