Search:

SPEER .570 278GR from Reloaders is the largest in NZ I am aware of......... https://tinyurl.com/y9ebcd4y

Of interest if you are to go the round ball way.......... ...

Rice works well and may be cheaper. As for your projectile..........................who makes that mould?

Starting at the beginning, have you seen these two videos on YouTube. I found them very helpful.

https://tinyurl.com/y7v83xc3

https://tinyurl.com/y86sj2u3

Secondly, looking at your brass, I...