M7 Priest Question

105mm artillery rounds come in a couple different colors depending on what they are/do.  As you can see in the below pics, the most common are OD green for HE (High Explosive) and HEAT (High Explosive Anti Tank), and grey for smoke rounds.  The casings are always brass.  The fuse (on the pointy end) is usually silver.

I'm sure some of the Redlegs here can be more helpful, but the projectile portion of the shell will vary in color, according to type, as will any bands or stencils. The cardboard tubes that the rounds are shipped in are an off black cardboard with black metal end pieces. The seperate powder casing is metallic.

In the above pic, they are stored in the black paper "tootsi roll" shipping cases. 

Which is found easily enough in photos