Corrosive, non-collectible ammunition does lower the worth, somewhat.
I was just reading John George's "Shots Fired in Anger" - a classic on combat during WWII. He used a M1903 sniper/target rifle and said he especially like Denver ammunition - he didn't say what year. He carefully hoarded a case of it for his personal use through much of WWII.
$70 for 192 rounds sticks in my mind for the cost of the CMP AP ammo.
"We make men without chests and expect from them virtue and enterprise. We laugh at honor and are shocked to find traitors in our midst."