The 232gr. VULCAN has a VERY thick jacket. I sectioned one just to check as I could not get the bonded Oryx at that time.

The 286gr. Vulcan might be a very good bullet for the 9.3x57, if it maintains the jacket thickness - I think it was 1/16", or .0625".

The bullet second from the right, is the 232 Oryx. After sectioning it, I squeezed it/them lengthwise to separate the jacket from the core so relative jacket thickness could be observed.

The bullet on the far right, is the 270gr. Speer. The bullet 3rd from the right is the 235gr. .375" Speer sized to .366", and the one 4th, is the 220gr. Hornady sized down to .366" also.