Dardick's patent 2,865,126 for a new and improved cartridge for the open chamber gun shows the symmetrical tround shape, which would facilitate feeding from a magazine, since the trounds can enter the split in any orentation and end up seating correctly.
Dardick's patent 2,865,126 for a new and improved cartridge for the open chamber gun shows the symmetrical tround shape. The symmetrical tround shape would facilitate feeding from a magazine. The trounds can enter the split in any orentation. The trounds can end up seating correctly.