Yes. I have heard this figure of 10,000 bullets but it does raise a question of calculation - It is probably derived from dividing total bullet production ( both sides ) by the total number of casualties ( on both sides ) - however a significant number of bullets were never fired - they were lost, stolen, destroyed, captured and those that were not fired due to the termination of the war. Regardless, the point is valid, the number of bullets fired greatly exceeds the number of casualties.