Here are a couple of tracer bullets I would like some information on. I posted them in the distant past but didn’t get any definative identification. Maybe some one has some new thoughts.
The first is just a cross sectioned example. It’s GMCS, 1.302" Long (33.09mm), and 0.310" in diameter (7.88mm). It has a smooth and knurled cannelure, the smooth one is about 0.52" from the base and the knurled one about 0.66" from base.
The second one is also GMCS. It’s 1.325" long (33.66mm) 0.307" in diameter (7,78mm) and weighs 143 grains. There are two knurled cannelures one about 0.49" from the base and the second 0.58".