Haven't used the Vulkan, but the Oryx tends to expand very widely at modern 9.3x62 velocities, so doesn't penetrate all that deeply. This is no big deal on deer-sized game, in fact sometimes helps kill quicker.
In fact Oryx bullets tend to expand widely in ALL calibers, so even though they typically retain around 90% of their weight, don't penetrate as deeply as most other controlled-expanding bullets.
