Well I only have 34 years in the Ammunition/Explosives world, but I have always believed that when you are trying to make a point, the surest way to get someone's attention is to provide chapter and verse where the facts can be verified. Please keep in mind that different countries use different chemical compositions in the making of both the igniter and tracer compositions which can give off different colours.
Military Explosives (1955) TM 9-1910 Page 292 Para 104: General
a) "In small arms cartridge tracers, the rear of the bullet has a cavity into which are loaded tracer and igniter composition, using a pressure of 70,000 to 85,000 psi."
b)" In effect, the tracer composition is ignited by the hot gases resulting from burning of the propellent charge. However, since tracer compositions are relatively difficult to ignite, there is loaded on top of the tracer composition a much more easily ignitable igniter composition. This is generally done with a stepped ram. As a brilliant light from the igniter composition may dazzle the eye of the gunner and the completely visible trajectory of the round would betray the position of the weapon, a "dim igniter" composition is used. Igniter as well as tracer compositions are classified as pyrotechnic compositions because of their compositions and their production of light when burned."
During the 40's-'60's U.S. tracer compositions contained various percentages of the following chemicals
1) Magnesium
2) Magnesium-aluminum alloy
3) Chlorinated Rubber
4) Strontium Nitrate
5) Barium Peroxide
6) Calcium Resinate
7) Polyvinyl chloride
In accordance with the Royal Canadian Ordnance Corp Bulletins(Feb 1972) in the .30 Caliber M25 Tracer Cartridge produced for the Canadian Army, 50.0 grains of IMR 4895 was used for the 146.5 grain bullet.
I would be very interested to see any reference regarding "phosphorous" used in TRACER ammunition.