11. Tracer rounds raced through the blackened sky and artillery shells were exploding in the air.12. Tracer rounds were fired first until hits were observed before firing off the main gun.13. The M70 tracer round burns out to. 14. Barrels have a 1 : 7 twist to fire NATO standard ball and tracer rounds . 15. That evening tracer rounds , shots and lights again alerted the defenders of an impending attack. 16. As night fell, bright red tracer rounds lit up the valley and exploded in white flashes. 17. A training variant used by the Finnish armed forces fires 7.62-mm tracer rounds . 18. The protocol specifically excludes weapons whose incendiary effect is secondary, such as smoke and tracer rounds . 19. His research was conducted by firing rounds into tracer round , rather than firing one for one. 20. The nervous shove of a Marine scrambling for space along a brick wall as tracer rounds ricocheted above.
