PPU 22 Hornet brass has less case capacity then Win; Rem; and Federal. 13 grains of LilGun will not fit, even with vibration. I have read that the alloy used for PPU brass has a lower brass content and that is why it is heavier. Since I am not a chemist I cannot confirm the brass content. I can confirm that PPU brass is the heaviest of all I have weighed.
