cleanest range ammo?

[ekkthree]

getting my first ar and wanted a recommendation for a clean shooting bulk ammo. typical range ammo restrictions apply. fmj, no steel, etc...

[the86d]

Assuming .223/5.56, and anything is cleaner tan "Bear", Tul*, or Wolf, at least in my 20" 1:8, with a full length (not sure if relevant) rifle stock and buffer. I have only shot a few mfrs before I started reloading 5.56. I recall everything else I have shot being about the same if not from the Com.block.