having shot all ammunition, having fired all rounds, having expended ammunition
Если из ста вы́стрелов один не попа́л в цель - э́то уже не первокла́ссная стрельба́.
If one in one hundred rounds does not hit the target, it's not first-class shooting.
Я не разбаза́риваю патро́ны.
I'm not wasting rounds.
