.348 I sold my last box of 20 for $60 (it was Winchester 250 grain silvertip, which they supposedly still make the 200 grain, but I never seem to be able to find it)..
Really, I get worried about shooting even my 7.62x39 from my SAIGA.. ya never know when politics might make imported ammunition illegal. Otherwise, that is the most expensive round I shoot, aside from some 12 gauge buckshot, which I only do about once a year.
.22 Remington golden bulk packs. Dirty as heck, cheap as heck. Pretty much gotta do a hefty cleaning of my marlin 60ss every 100 rounds or so of that stuff. It will still work, but its just that the stock is even dirty by the ejection port..