copper 6.5prc

Purchased a Sako S20, in 6.5PRC, with 1 in 8 24” barrel and trying to work a copper load, as UK is being obligated to move to copper bullets, for deer in the next few years. Have tried factory Hornady 130CX Hand loads using Barnes 120gr TTSK, Sako 120gr Blades and Virtus `Merlin 130 gr (UK based...