I did not know where to post this so Mods should move it as appropriate.
For those looking for cheap plinking bullets for their AR's, and struggling with .22 cal cast, Midsouth has bulk bullets on sale. I priced out 6000 Hornady 55 gr FMJ's and they came to less than $450 shipped and insured. That works out to $7.50/100. Including adding a GC, using 92-2-6 alloy, my cost is about $4/100 for cast bullets. YMMV but not worth it to me.
They have smaller quantities, Hornady match bullets, and other calibers on sale as well.