Last time I checked my California Penal Code tracers, except for the shotgun rounds that used to be available, were illegal to possess. I'd be real real careful when and where I carried them, let alone used them...

Here is a part of the section...CALIFORNIA CODES
PENAL CODE
SECTION 12301-12316

12301. (a) The term "destructive device," as used in this chapter,shall include any of the following weapons:
(1) Any projectile containing any explosive or incendiary material or any other chemical substance, including, but not limited to, that which is commonly known as tracer or incendiary ammunition, except tracer ammunition manufactured for use in shotguns...