Looks like u need 3 and I have extras of 3 you don't have in pic.
I saved boxes of stuff we shot in 60s and 70s. Almost all marked 80c. Now I'm glad I did. Each box of 50 accounts for about 25 30 rats at city dump. PM if u want them.
I've been giving all my old and weird ammo to my FFL, for decades. He's had all kinds of old stuff displayed all over his store. I don't really have any fondness for stuff before my generation in my hobbies.
Lake City M855 manufactured for Federal by my former company, Northrop Grumman Corp. NGC Innovative Systems operated the Lake City Army Ammunition Plant for many years under Orbital ATK - Alliant Techsystems (ATK) before selling off & turning operations over to Winchester/Olin in 2020. During this time, there were huge cash rebates available from Federal when purchasing this ammo in bulk. Unfortunately, there were no NGC employee discounts; trust me, I tried.