So this is available right now:
Lake City Ammunition
Target Sports USA Lake City 5.56x45mm SS109 Ammo 62 Grain FMJ Penetrator 1000 Rounds

It is 599.00 plus shipping. At .60 cents per round this seems like a lot of money. Am I crazy for not buying it? All ammo has gone up from pricing on SGAMMO from the ad to where you order it and some have nearly doubled in price. I am way too new at this 5.56 game to know if this is good ammo or not. I am familiar with Lake City as it's in Missouri near KC

I sold a bulk pack of penetrator from Lake City last weekend at a show and got $600 for it. Guy asked me if I had more. Sold another case of IMI for a bit more. Dude across from me was selling steel cased .223 for a buck apiece so I didn't feel as bad about my asking price.
One of these days, you will be able to get it again for $260 or so. Just depends on how quickly you want it.

if you need it -- buy a case

if you DONT need it -- skip that

during the crush of 2013 my high water mark for 556 was ~$725 for a 1,200 rd case of IMI fwiw

supply / demand is a thing

predictably looks like its gone now -- without ammo your rifle is a paper weight

dudes will be selling those cases at a gun show next weekend for $800 / case

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The green tip is not the most accurate 5.56 out there...personally I wouldn’t give anywhere near that (but I stocked up on ammo and reloading stuff “when things are quiet”...thanks Para)...that being said...it’s a personal thing if you have a rifle and no ammunition for it...it’s up to you and your finances..if it’s worth It.