Solid copper projectiles are used for a number of reasons.
-They are easier to make than a copper-jacketed lead-core bullet. Less overhead required.
-The solid copper projectiles expand with more consistency than lead-core bullets that have copper jackets. (allowing design features that...
Here is a high purity copper supplier. What is the theory behind needing 100% pure copper as opposed to 99.9% or 99.99% pure copper? https://www.alibaba.com/product-detail/factory-sale-high-purity-oxygen-free_60629543094.html?spm=a2700.7724838.2017115.60.5c36682346jF1v&s=p
You said you'd...