My guess is ammo zoomed up in price sometime after the year 2007 and by 2009 it was obvious. Back then hollow point stuff was still available in the normal 50 round pack. Below are images of the CTD (Cheaper Than Dirt) catalog of ammo pricing for 2007 and 2009. The name of the image corresponds to the source and year.
Walmart’s pricing today appears to be similar to that of the 2007 CTD.
