Sierra makes lots of "contract" bullets that never get to a green box. I know that they've sold some to Federal in the past, but I don't know if they still have contracts to do so. They sold a flat-based .308" 165gr. (ProHunter) to Federal for the 'red box' ammo, because I asked them (on a plant tour) to sell me some, and they wouldn't, because they were strictly for that contract.
I'm sure they make other bullets for other contracts, too. I know they've supplied Fiocchi and S&B, also.
