Copper loads for 6.5x284

[Scottish Pro Sporter]

Hi folks, we are relatively new to non-toxic loads here in the UK as far as rifles are concerned. As I work for a government organisation we are moving towards non lead bullets.
I have a 6.5x284 short action. I have a fantastic load with Berger 120grn Target load but want to develop a copper load hitch is good as a long range load but one that hopefully loads through my AI mag (2.880" COAL).

Any help would be great