Thanks!

I used methylene chloride, which is actually a solvent for acrylic. They call it "solvent welding", rather than gluing. There is no way it is coming apart without breaking the base material in the process. I suspect it is several times stronger than a pin would be. A pin creates somewhat of a stress point and acrylic doesn't like it.

Are rifle rounds made of brass, or is it some other alloy?

Thanks.