I have loaded ammunition for an 8x51 many years ago. The owner of the Mannlicher rifle had dies and it was a simple matter to run 308Win cases in the FL die and load up. I cannot recall the bullet weight or powder I used and have not kept the records when transferring my data to excel database but I do know the projectiles were Norma .318" diameter which I was using for reloading in the 32 Remington I had at the time. I don't think they were as heavy as 196gr so were possibly around 150gr.

The load I developed was accurate and the rifles owner killed quite a few red deer with it. Because of the possibility of the 308Win headstamped ammo being confused with 308W or vice versa I applied a colour to the primers and a warning on the ammo boxes.