John, the 30 Super is a belted cartridge like the 300 H&H and was actually the forerunner to that cartridge. Dimensionally they are very similar but the velocity on the 300 H&H was also increased when they changed then name, which they did to ring it in line with their other bolt action cartridges such as the 244, 275 and 375 H&H. The rifle shown definitely fire the belted magnum case.

Matt.