i dont see how they could unless they where tracers or some of the sort. lead or copper doesnt cause sparks.
I saw a small brush fire start during a small machinegun shoot last year-conditions were hot and dry, and there were only two or three tracer rounds shot by one shooter before being stopped, so it was definitely caused by a hot, non-tracer projectile ricocheting off a hard target and into dead brush.
Originally Posted by Standing Wolf:
Well, yeah, but everybody knows firearms cause cancer.
I would say it is far more likely that still-burning bits of powder flying out the muzzle ignited some dry grass, etc. This is more common with shorter barrel firearms (such as handguns) and is more common in some ammo brands than in others. Some ammo I have shot from a pistol throws a shower of glowing bits out behind the bullet. It is certainly possible that a bit could stick to the back of a bullet. Unlikely, but possible.