Got a few suggestions for ya bro. Winchester Q3131A is mil-spec ammo manufactured in Israel for Winchester, super ammo at an affordable price. Some will tell you that Winchester Q3131, which is made in the US, is the same as the Q3131A, not true from my experience. The Q3131A is a hotter load and is sealed. This is my first choice for SHTF stash ammo.
www.botac.com has 1200 rounds of IMI (Israeli Military Industries) 5.56 mil-spec ammo for $189.00 shipped. This is also worthy of SHTF stash. This comes packaged in 30 round boxes. Thirty round mags, thirty round boxes, quite convenient. This is a really good deal. Some people have had problems with this outfit in the past. I have not experienced any problems so far with them.
I use Sellier & Bellot (S&B) for range work. It is almost mil-spec.
www.natchezss.com sells it for $3.19/box of 20. It's comes in a mint green box. It is good clean ammo. I have had a few FTF's but not many at all. It is brass cased, boxer primed, and non corrosive. It does have a steel jacket on the bullet that is copper washed. I know some people don't like that but my rifles have chromed bores and chambers and these bullets will do no harm at all to them. I will use this ammo over Wolf any day. A lot of people use and like Wolf ammo, I'm just not one of them.
I like the Lake City XM-193 ammo. I have gotten some that I have felt was not up to what it should be as far as the QC is concerned. I have gotten other lots that were super. For consistancy sake I will take the Winchester Q3131A over the LC stuff. Just my humble opinion. Wholesale Hunter does have some good deals from time to time. Get on their e-mail list to get first stab at the best deals.
Good Luck and good shooting!!
Shabo