Hodgdon reloading data for .30 Super Carry is now available online
https://www.hodgdonreloading.com/reloading-data-center
71 gr. JHP @ 1650 ft/s
85 gr. JHP @ 1450 ft/s
Higher velocity than .30 Luger, equal to .30 Mauser, and comparable to some 7.62 Tokarev from a pistol