I would be shooting the Hornady 75gr AMAX or the new equivalent ELD when it's available. They're cheap. $185/1000

I was thinking of building a custom .223AI 8-twist just to hopefully shoot the 75gr AMAX/ELD for long-range fun shooting. But the gun I bought was so accurate stock, I decided to shoot the piss out of it instead. Someday I'll throw an AI barrel on it.