200 rounds is just an ordinary day at the range. You really need at least 10,000 rounds per battle rifle.
Yep, 10k per gun here. If I have 3 5.56mm, I 'll have 30k rounds. I have had more than that since the Kringtong era gun grab...bought a bunch of IMI, South African, S. Korean, and Spanish military surplus. Man...that was 20 years ago.
Add 12-20 magazines + spare parts per gun and you are within the "good to go" zone.