On 7 May 2004 13:26:55 -0700, (Alan Berry)
etched the phosphur particles on my screen with the following:

What tracer rounds are used with the longer range PGU-28/B 20mm
cartidges? I cannot find reference to a (non-target-practice) tracer
with equivalent ballistics.

My unit used NTP tracers manufactured by Hewlett-Packard and DuPont
joint venture. About 27% were duds.