Depends on the pure copper bullet. They are not all the same. We have been through literally thousands of pounds of copper to find what does what we want.
Forgot to mention that I have not used them but seen the results of them up close and I've been hesitant to try them, but I am not sure if they were used correctly. A few years ago I acquired several thousand 7mm bullets and amongst them came a box of the 120gr TTSX. What would you recomment on these? to be used on the 7 Rem Mag or the 7mm-08?
I dont plan to purchase any bullets of any kind because I still have over 4k of them on different brands, types and weights.
Thank you and beat regards
LVJ76