Have you had a look at the Saxtech KJG bullets? They are solid copper,and the Saxtech site has a number of tests and hunters accounts on the superior performance of these projectiles.

I have just received some for my 8x68. They are beautifully presented and well finished. I would be astonished if these didnt fly well. Plenty of speed with the lighter weights, but good weight retention on impact, enabling deep penetration.

should be good in any 8mm I would think.

Andrew