I highly disagree ... 5.7 ammo is the only ammo that I know of that HASN'T gone up in price in recent months. For example ... what I pay wholesale now for some premium ammos is what I used to retail it for. 5.7 has stayed at the same price point regardless of all other ammo prices increasing.
Also, as was said by FN Man elsewhere in this forum, 5.7 is some of the least inexpensive rifle ammo available.
It's very important to remember that all 5.7 ammo, including civilian SS195 and SS197, is PREMIUM ammo not Wal-Mart FMJ's. Try buying a 50 rd box of PREMIUM 45 ACP for $18 these days.