If we're talking about a novice, it may be expecting too much for him to have selected a .223 for any reason other than convenience.
E.g., it's more likely that it's simply what he already owned, or could easily get his hands on, or could afford.
I believe "Sniper No. 1" has left the area at least temporarily with someone else. He is the arms expert, No. 1 marksman and the planner.
The second "sniper" is now active and responsible for the last two "Non Kill" shots.
He and a third person will continue to take "non'kill" shots.
What is "Sniper No. 1" up to??
Don't forget, Atta and friends constantly rented vehicles for a couple of weeks at a time to get around. Rentals might be a place to look.
Sac