I agree reloading is the way to go....
But remember that most of the surplus ammo for Milsurp guns is not reloadable with normal US tools.
Steel cased ammo is not reloadable (without wrecking standard dies), and besides, none of it is boxer primed. The overwhelming majority of European ammo is Berdan primed (no central flashhole in the case), which makes getting the old primer out a major hassle, and Berdan primers are difficult to get in the US, if not close to impossible. Special tools are needed, and for anything except the very rare calibers where no modern boxer primed brass is available, it isn't even close to cost effective.
Buying case lots of milsurp ammo is the way to go, when you can afford it, simply because (even with the price increases) its still the cheapest out there, and they aren't going to be getting any more of it much, in the future.
Rounds like the .303 British, 8mm or even the .30-06 haven't been the issue rounds for armies in decades, and the stockpiles of milsurp ammo are drying up. Add in the fact that the UN has been busy in recent years, working hard to reduce the "international trade in arms", and yes, that includes surplus ammo. Many countries are now destroying their surplus ammo, getting brownie points from the UN for doing so, rather than selling it on the open market. I believe that the cheap surplus ammo for anything not currently military issue around the world is going to go away within the next generation, if it takes that long.
The problem with surplus ammo, for plinking, is (besides the accuracy, which can vary greatly) is that for reloading, the fired cases are nothing but scrap metal (the exception is US GI surplus, which is quite reloadable). So, I recommend that for every case lot (or lesser amount) of milsurp ammo you buy, buy at least one box of new made commercial boxer primed ammo in that caliber. Save it for hunting, or whatever, but save the brass, no matter what. A box of Remington .303 British or 8mm Mauser, etc. will cost you as much as several boxes of milsurp, but when the milsurp is gone, its gone. When the Remington stuff is fired, you can reload the cases.
As to what you should keep on hand? I say at least 100rnds for each firearm. If you have the funds, and the storage space, thousands o rounds are fine. They keep, when correctly stored, longer than you or I will. But 100 rnds on hand, at all times gives you enough for a while, without seeming too excessive to most folks. Enough for a fine day at the range, unless you are shooting full auto, or like to rapid fire semis, in which case, you ought to lay in a larger supply. For rifles. For handguns, doubling the amount isn't too much, and might not be enough!
